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# List of changes to Matplotlib prior to 2015

This is a list of the changes made to Matplotlib from 2003 to 2015. For more recent changes, please refer to the what’s new or the API changes.

2015-11-16 Levels passed to contour(f) and tricontour(f) must be in increasing
  order.

2015-10-21 Added TextBox widget

2015-10-21 Added get_ticks_direction()

2015-02-27 Added the rcParam ‘image.composite_image’ to permit users
  to decide whether they want the vector graphics backends to combine all images within a set of axes into a single composite image. (If images do not get combined, users can open vector graphics files in Adobe Illustrator or Inkscape and edit each image individually.)
2015-02-19 Rewrite of C++ code that calculates contours to add support for
  corner masking. This is controlled by the ‘corner_mask’ keyword in plotting commands ‘contour’ and ‘contourf’. - IMT
2015-01-23 Text bounding boxes are now computed with advance width rather than
  ink area. This may result in slightly different placement of text.
2014-10-27 Allowed selection of the backend using the `MPLBACKEND` environment
  variable. Added documentation on backend selection methods.
2014-09-27 Overhauled `colors.LightSource`. Added `LightSource.hillshade` to
  allow the independent generation of illumination maps. Added new types of blending for creating more visually appealing shaded relief plots (e.g. `blend_mode="overlay"`, etc, in addition to the legacy “hsv” mode).

2014-06-10 Added Colorbar.remove()

2014-06-07 Fixed bug so radial plots can be saved as ps in py3k.

2014-06-01 Changed the fmt kwarg of errorbar to support the
  the mpl convention that “none” means “don’t draw it”, and to default to the empty string, so that plotting of data points is done with the plot() function defaults. Deprecated use of the None object in place “none”.
2014-05-22 Allow the linscale keyword parameter of symlog scale to be
  smaller than one.
2014-05-20 Added logic to in FontManager to invalidate font-cache if
  if font-family rcparams have changed.

2014-05-16 Fixed the positioning of multi-line text in the PGF backend.

2014-05-14 Added Axes.add_image() as the standard way to add AxesImage
  instances to Axes. This improves the consistency with add_artist(), add_collection(), add_container(), add_line(), add_patch(), and add_table().

2014-05-02 Added colorblind-friendly colormap, named ‘Wistia’.

2014-04-27 Improved input clean up in Axes.{h|v}lines
  Coerce input into a 1D ndarrays (after dealing with units).

2014-04-27 removed un-needed cast to float in stem

2014-04-23 Updated references to “ipython -pylab”
  The preferred method for invoking pylab is now using the “%pylab” magic. -Chris G.
2014-04-22 Added (re-)generate a simple automatic legend to “Figure Options”
  dialog of the Qt4Agg backend.
2014-04-22 Added an example showing the difference between
  interpolation = ‘none’ and interpolation = ‘nearest’ in `imshow()` when saving vector graphics files.
2014-04-22 Added violin plotting functions. See `Axes.violinplot`,
  `Axes.violin`, `cbook.violin_stats` and `mlab.GaussianKDE` for details.
2014-04-10 Fixed the triangular marker rendering error. The “Up” triangle was
  rendered instead of “Right” triangle and vice-versa.
2014-04-08 Fixed a bug in parasite_axes.py by making a list out
  of a generator at line 263.
2014-04-02 Added `clipon=False` to patch creation of wedges and shadows
  in `pie`.
2014-02-25 In backend_qt4agg changed from using update -> repaint under
  windows. See comment in source near `self._priv_update` for longer explaination.
2014-03-27 Added tests for pie ccw parameter. Removed pdf and svg images
  from tests for pie linewidth parameter.
2014-03-24 Changed the behaviour of axes to not ignore leading or trailing
  patches of height 0 (or width 0) while calculating the x and y axis limits. Patches having both height == 0 and width == 0 are ignored.
2014-03-24 Added bool kwarg (manage_xticks) to boxplot to enable/disable
  the managemnet of the xlimits and ticks when making a boxplot. Default in True which maintains current behavior by default.
2014-03-23 Fixed a bug in projections/polar.py by making sure that the theta
  value being calculated when given the mouse coordinates stays within the range of 0 and 2 * pi.
2014-03-22 Added the keyword arguments wedgeprops and textprops to pie.
  Users can control the wedge and text properties of the pie in more detail, if they choose.
2014-03-17 Bug was fixed in append_axes from the AxesDivider class would not
  append axes in the right location with respect to the reference locator axes

2014-03-13 Add parameter ‘clockwise’ to function pie, True by default.

2014-02-28 Added ‘origin’ kwarg to `spy`

2014-02-27 Implemented separate horizontal/vertical axes padding to the
  ImageGrid in the AxesGrid toolkit
2014-02-27 Allowed markevery property of matplotlib.lines.Line2D to be, an int
  numpy fancy index, slice object, or float. The float behaviour turns on markers at approximately equal display-coordinate-distances along the line.
2014-02-25 In backend_qt4agg changed from using update -> repaint under
  windows. See comment in source near `self._priv_update` for longer explaination.
2014-01-02 `triplot` now returns the artist it adds and support of line and
  marker kwargs has been improved. GBY
2013-12-30 Made streamplot grid size consistent for different types of density
  argument. A 30x30 grid is now used for both density=1 and density=(1, 1).
2013-12-03 Added a pure boxplot-drawing method that allow a more complete
  customization of boxplots. It takes a list of dicts contains stats. Also created a function (`cbook.boxplot_stats`) that generates the stats needed.
2013-11-28 Added qhull extension module to perform Delaunay triangulation more
  robustly than before. It is used by tri.Triangulation (and hence all pyplot.tri* methods) and mlab.griddata. Deprecated matplotlib.delaunay module. - IMT
2013-11-05 Add power-law normalization method. This is useful for,
  e.g., showing small populations in a “hist2d” histogram.
2013-10-27 Added get_rlabel_position and set_rlabel_position methods to
  PolarAxes to control angular position of radial tick labels.
2013-10-06 Add stride-based functions to mlab for easy creation of 2D arrays
  with less memory.
2013-10-06 Improve window and detrend functions in mlab, particulart support for
  2D arrays.

2013-10-06 Improve performance of all spectrum-related mlab functions and plots.

2013-10-06 Added support for magnitude, phase, and angle spectrums to
  axes.specgram, and support for magnitude, phase, angle, and complex spectrums to mlab-specgram.
2013-10-06 Added magnitude_spectrum, angle_spectrum, and phase_spectrum plots,
  as well as magnitude_spectrum, angle_spectrum, phase_spectrum, and complex_spectrum functions to mlab
2013-07-12 Added support for datetime axes to 2d plots. Axis values are passed
  through Axes.convert_xunits/Axes.convert_yunits before being used by contour/contourf, pcolormesh and pcolor.
2013-07-12 Allowed matplotlib.dates.date2num, matplotlib.dates.num2date,
  and matplotlib.dates.datestr2num to accept n-d inputs. Also factored in support for n-d arrays to matplotlib.dates.DateConverter and matplotlib.units.Registry.
2013-06-26 Refactored the axes module: the axes module is now a folder,
  containing the following submodule:
    - _subplots.py, containing all the subplots helper methods
    - _base.py, containing several private methods and a new _AxesBase class. This _AxesBase class contains all the methods that are not directly linked to plots of the “old” Axes
    - _axes.py contains the Axes class. This class now inherits from _AxesBase: it contains all “plotting” methods and labelling methods.

  This refactoring should not affect the API. Only private methods are not importable from the axes module anymore.

2013-05-18 Added support for arbitrary rasterization resolutions to the
  SVG backend. Previously the resolution was hard coded to 72 dpi. Now the backend class takes a image_dpi argument for its constructor, adjusts the image bounding box accordingly and forwards a magnification factor to the image renderer. The code and results now resemble those of the PDF backend. - MW
2013-05-08 Changed behavior of hist when given stacked=True and normed=True.
  Histograms are now stacked first, then the sum is normalized. Previously, each histogram was normalized, then they were stacked.

2013-04-25 Changed all instances of:

> from matplotlib import MatplotlibDeprecationWarning as mplDeprecation to:

> from cbook import mplDeprecation

> and removed the import into the matplotlib namespace in __init__.py Thomas Caswell

2013-04-15 Added ‘axes.xmargin’ and ‘axes.ymargin’ to rpParams to set default
  margins on auto-scaleing. - TAC

2013-04-16 Added patheffect support for Line2D objects. -JJL

2013-03-31 Added support for arbitrary unstructured user-specified
  triangulations to Axes3D.tricontour[f] - Damon McDougall
2013-03-19 Added support for passing `linestyle` kwarg to `step` so all `plot`
  kwargs are passed to the underlying `plot` call. -TAC
2013-02-25 Added classes CubicTriInterpolator, UniformTriRefiner, TriAnalyzer
  to matplotlib.tri module. - GBy
2013-01-23 Add ‘savefig.directory’ to rcParams to remember and fill in the last
  directory saved to for figure save dialogs - Martin Spacek
2013-01-13 Add eventplot method to axes and pyplot and EventCollection class
  to collections.
2013-01-08 Added two extra titles to axes which are flush with the left and
  right edges of the plot respectively. Andrew Dawson

2013-01-07 Add framealpha keyword argument to legend - PO

2013-01-16 Till Stensitzki added a baseline feature to stackplot

2012-12-22 Added classes for interpolation within triangular grids
  (LinearTriInterpolator) and to find the triangles in which points lie (TrapezoidMapTriFinder) to matplotlib.tri module. - IMT
2012-12-05 Added MatplotlibDeprecationWarning class for signaling deprecation.

  Matplotlib developers can use this class as follows:

  from matplotlib import MatplotlibDeprecationWarning as mplDeprecation

  In light of the fact that Python builtin DeprecationWarnings are ignored by default as of Python 2.7, this class was put in to allow for the signaling of deprecation, but via UserWarnings which are not ignored by default. - PI

2012-11-27 Added the mtext parameter for supplying matplotlib.text.Text
  instances to RendererBase.draw_tex and RendererBase.draw_text. This allows backends to utilize additional text attributes, like the alignment of text elements. - pwuertz
2012-11-26 deprecate matplotlib/mpl.py, which was used only in pylab.py and is
  now replaced by the more suitable `import matplotlib as mpl`. - PI

2012-11-25 Make rc_context available via pyplot interface - PI

2012-11-16 plt.set_cmap no longer throws errors if there is not already
  an active colorable artist, such as an image, and just sets up the colormap to use from that point forward. - PI
2012-11-16 Added the funcction _get_rbga_face, which is identical to
  _get_rbg_face except it return a (r,g,b,a) tuble, to line2D. Modified Line2D.draw to use _get_rbga_face to get the markerface color so that any alpha set by markerfacecolor will respected. - Thomas Caswell
2012-11-13 Add a symmetric log normalization class to colors.py.
  Also added some tests for the normalization class. Till Stensitzki
2012-11-12 Make axes.stem take at least one argument.
  Uses a default range(n) when the first arg not provided. Damon McDougall

2012-11-09 Make plt.subplot() without arguments act as subplot(111) - PI

2012-11-08 Replaced plt.figure and plt.subplot calls by the newer, more
  convenient single call to plt.subplots() in the documentation examples - PI

2012-10-05 Add support for saving animations as animated GIFs. - JVDP

2012-08-11 Fix path-closing bug in patches.Polygon, so that regardless
  of whether the path is the initial one or was subsequently set by set_xy(), get_xy() will return a closed path if and only if get_closed() is True. Thanks to Jacob Vanderplas. - EF
2012-08-05 When a norm is passed to contourf, either or both of the
  vmin, vmax attributes of that norm are now respected. Formerly they were respected only if both were specified. In addition, vmin and/or vmax can now be passed to contourf directly as kwargs. - EF
2012-07-24 Contourf handles the extend kwarg by mapping the extended
  ranges outside the normed 0-1 range so that they are handled by colormap colors determined by the set_under and set_over methods. Previously the extended ranges were mapped to 0 or 1 so that the “under” and “over” colormap colors were ignored. This change also increases slightly the color contrast for a given set of contour levels. - EF

2012-06-24 Make use of mathtext in tick labels configurable - DSD

2012-06-05 Images loaded through PIL are now ordered correctly - CG

2012-06-02 Add new Axes method and pyplot function, hist2d. - PO

2012-05-31 Remove support for ‘cairo.<format>’ style of backend specification.
  Deprecate ‘cairo.format’ and ‘savefig.extension’ rcParams and replace with ‘savefig.format’. - Martin Spacek
2012-05-29 pcolormesh now obeys the passed in “edgecolor” kwarg.
  To support this, the “shading” argument to pcolormesh now only takes “flat” or “gouraud”. To achieve the old “faceted” behavior, pass “edgecolors=’k’”. - MGD

2012-05-22 Added radius kwarg to pie charts. - HH

2012-05-22 Collections now have a setting “offset_position” to select whether

  the offsets are given in “screen” coordinates (default, following the old behavior) or “data” coordinates. This is currently used internally to improve the performance of hexbin.

  As a result, the “draw_path_collection” backend methods have grown a new argument “offset_position”. - MGD

2012-05-04 Add a new argument to pie charts - startingangle - that
  allows one to specify the angle offset for the first wedge of the chart. - EP
2012-05-03 symlog scale now obeys the logarithmic base. Previously, it was
  completely ignored and always treated as base e. - MGD
2012-05-03 Allow linscalex/y keyword to symlog scale that allows the size of
  the linear portion relative to the logarithmic portion to be adjusted. - MGD
2012-04-14 Added new plot style: stackplot. This new feature supports stacked
  area plots. - Damon McDougall
2012-04-06 When path clipping changes a LINETO to a MOVETO, it also
  changes any CLOSEPOLY command to a LINETO to the initial point. This fixes a problem with pdf and svg where the CLOSEPOLY would then draw a line to the latest MOVETO position instead of the intended initial position. - JKS
2012-03-27 Add support to ImageGrid for placing colorbars only at
  one edge of each column/row. - RMM
2012-03-07 Refactor movie writing into useful classes that make use
  of pipes to write image data to ffmpeg or mencoder. Also improve settings for these and the ability to pass custom options. - RMM
2012-02-29 errorevery keyword added to errorbar to enable errorbar
  subsampling. fixes issue #600.
2012-02-28 Added plot_trisurf to the mplot3d toolkit. This supports plotting
  three dimensional surfaces on an irregular grid. - Damon McDougall
2012-01-23 The radius labels in polar plots no longer use a fixed
  padding, but use a different alignment depending on the quadrant they are in. This fixes numerical problems when (rmax - rmin) gets too small. - MGD
2012-01-08 Add axes.streamplot to plot streamlines of a velocity field.
  Adapted from Tom Flannaghan streamplot implementation. -TSY
2011-12-29 ps and pdf markers are now stroked only if the line width
  is nonzero for consistency with agg, fixes issue #621. - JKS

2011-12-27 Work around an EINTR bug in some versions of subprocess. - JKS

2011-10-25 added support for operatorname to mathtext,
  including the ability to insert spaces, such as $operatorname{arg,max}$ - PI
2011-08-18 Change api of Axes.get_tightbbox and add an optional
  keyword parameter call_axes_locator. - JJL
2011-07-29 A new rcParam “axes.formatter.use_locale” was added, that,
  when True, will use the current locale to format tick labels. This means that, for example, in the fr_FR locale, ‘,’ will be used as a decimal separator. - MGD
2011-07-15 The set of markers available in the plot() and scatter()

  commands has been unified. In general, this gives more options to both than were previously available, however, there is one backward-incompatible change to the markers in scatter:

  > “d” used to mean “diamond”, it now means “narrow diamond”. “D” can be used for a “diamond”.

  -MGD

2011-07-13 Fix numerical problems in symlog scale, particularly when
  linthresh <= 1.0. Symlog plots may look different if one was depending on the old broken behavior - MGD
2011-07-10 Fixed argument handling error in tripcolor/triplot/tricontour,
  issue #203. - IMT
2011-07-08 Many functions added to mplot3d.axes3d to bring Axes3D
  objects more feature-parity with regular Axes objects. Significant revisions to the documentation as well. - BVR
2011-07-07 Added compatibility with IPython strategy for picking
  a version of Qt4 support, and an rcParam for making the choice explicitly: backend.qt4. - EF
2011-07-07 Modified AutoMinorLocator to improve automatic choice of
  the number of minor intervals per major interval, and to allow one to specify this number via a kwarg. - EF
2011-06-28 3D versions of scatter, plot, plot_wireframe, plot_surface,
  bar3d, and some other functions now support empty inputs. - BVR
2011-06-22 Add set_theta_offset, set_theta_direction and
  set_theta_zero_location to polar axes to control the location of 0 and directionality of theta. - MGD
2011-06-22 Add axes.labelweight parameter to set font weight to axis
  labels - MGD.

2011-06-20 Add pause function to pyplot. - EF

2011-06-16 Added bottom keyword parameter for the stem command.
  Also, implemented a legend handler for the stem plot. - JJL

2011-06-16 Added legend.frameon rcParams. - Mike Kaufman

2011-05-31 Made backend_qt4 compatible with PySide . - Gerald Storer

2011-04-17 Disable keyboard auto-repeat in qt4 backend by ignoring
  key events resulting from auto-repeat. This makes constrained zoom/pan work. - EF
2011-04-14 interpolation=”nearest” always interpolate images. A new
  mode “none” is introduced for no interpolation - JJL
2011-04-03 Fixed broken pick interface to AsteriskCollection objects
  used by scatter. - EF
2011-04-01 The plot directive Sphinx extension now supports all of the
  features in the Numpy fork of that extension. These include doctest formatting, an ‘include-source’ option, and a number of new configuration options. - MGD
2011-03-29 Wrapped ViewVCCachedServer definition in a factory function.
  This class now inherits from urllib2.HTTPSHandler in order to fetch data from github, but HTTPSHandler is not defined if python was built without SSL support. - DSD

2011-03-10 Update pytz version to 2011c, thanks to Simon Cross. - JKS

2011-03-06 Add standalone tests.py test runner script. - JKS

2011-03-06 Set edgecolor to ‘face’ for scatter asterisk-type
  symbols; this fixes a bug in which these symbols were not responding to the c kwarg. The symbols have no face area, so only the edgecolor is visible. - EF
2011-02-27 Support libpng version 1.5.x; suggestion by Michael
  Albert. Changed installation specification to a minimum of libpng version 1.2. - EF
2011-02-20 clabel accepts a callable as an fmt kwarg; modified
  patch by Daniel Hyams. - EF
2011-02-18 scatter([], []) is now valid. Also fixed issues
  with empty collections - BVR

2011-02-07 Quick workaround for dviread bug #3175113 - JKS

2011-02-05 Add cbook memory monitoring for Windows, using
  tasklist. - EF
2011-02-05 Speed up Normalize and LogNorm by using in-place
  operations and by using float32 for float32 inputs and for ints of 2 bytes or shorter; based on patch by Christoph Gohlke. - EF
2011-02-04 Changed imshow to use rgba as uint8 from start to
  finish, instead of going through an intermediate step as double precision; thanks to Christoph Gohlke. - EF
2011-01-13 Added zdir and offset arguments to contourf3d to
  bring contourf3d in feature parity with contour3d. - BVR

2011-01-04 Tag 1.0.1 for release at r8896

2011-01-03 Added display of ticker offset to 3d plots. - BVR

2011-01-03 Turn off tick labeling on interior subplots for
  pyplots.subplots when sharex/sharey is True. - JDH

2010-12-29 Implement axes_divider.HBox and VBox. -JJL

2010-11-22 Fixed error with Hammer projection. - BVR

2010-11-12 Fixed the placement and angle of axis labels in 3D plots. - BVR

2010-11-07 New rc parameters examples.download and examples.directory
  allow bypassing the download mechanism in get_sample_data. - JKS
2010-10-04 Fix JPEG saving bug: only accept the kwargs documented
  by PIL for JPEG files. - JKS

2010-09-15 Remove unused _wxagg extension and numerix.h. - EF

2010-08-25 Add new framework for doing animations with examples.- RM

2010-08-21 Remove unused and inappropriate methods from Tick classes:
  set_view_interval, get_minpos, and get_data_interval are properly found in the Axis class and don’t need to be duplicated in XTick and YTick. - EF
2010-08-21 Change Axis.set_view_interval() so that when updating an
  existing interval, it respects the orientation of that interval, and can enlarge but not reduce the interval. This fixes a bug in which Axis.set_ticks would change the view limits of an inverted axis. Whether set_ticks should be affecting the viewLim at all remains an open question. - EF
2010-08-16 Handle NaN’s correctly in path analysis routines. Fixes a
  bug where the best location for a legend was not calculated correctly when the line contains NaNs. - MGD

2010-08-14 Fix bug in patch alpha handling, and in bar color kwarg - EF

2010-08-12 Removed all traces of numerix module after 17 months of
  deprecation warnings. - EF
2010-08-05 Added keyword arguments ‘thetaunits’ and ‘runits’ for polar
  plots. Fixed PolarAxes so that when it set default Formatters, it marked them as such. Fixed semilogx and semilogy to no longer blindly reset the ticker information on the non-log axis. Axes.arrow can now accept unitized data. - JRE
2010-08-03 Add support for MPLSETUPCFG variable for custom setup.cfg
  filename. Used by sage buildbot to build an mpl w/ no gui support - JDH
2010-08-01 Create directory specified by MPLCONFIGDIR if it does
  not exist. - ADS

2010-07-20 Return Qt4’s default cursor when leaving the canvas - DSD

2010-07-06 Tagging for mpl 1.0 at r8502

2010-07-05 Added Ben Root’s patch to put 3D plots in arbitrary axes,
  allowing you to mix 3d and 2d in different axes/subplots or to have multiple 3D plots in one figure. See examples/mplot3d/subplot3d_demo.py - JDH
2010-07-05 Preferred kwarg names in set_xlim are now ‘left’ and
  ‘right’; in set_ylim, ‘bottom’ and ‘top’; original kwargs are still accepted without complaint. - EF
2010-07-05 TkAgg and FltkAgg backends are now consistent with other
  interactive backends: when used in scripts from the command line (not from ipython -pylab), show blocks, and can be called more than once. - EF
2010-07-02 Modified CXX/WrapPython.h to fix “swab bug” on solaris so
  mpl can compile on Solaris with CXX6 in the trunk. Closes tracker bug 3022815 - JDH
2010-06-30 Added autoscale convenience method and corresponding
  pyplot function for simplified control of autoscaling; and changed axis, set_xlim, and set_ylim so that by default, they turn off the autoscaling on the relevant axis or axes. Therefore one can call set_xlim before plotting a line, for example, and the limits will be retained. - EF
2010-06-20 Added Axes.tick_params and corresponding pyplot function
  to control tick and tick label appearance after an Axes has been created. - EF
2010-06-09 Allow Axes.grid to control minor gridlines; allow
  Axes.grid and Axis.grid to control major and minor gridlines in the same method call. - EF
2010-06-06 Change the way we do split/dividend adjustments in
  finance.py to handle dividends and fix the zero division bug reported in sf bug 2949906 and 2123566. Note that volume is not adjusted because the Yahoo CSV does not distinguish between share split and dividend adjustments making it near impossible to get volume adjustement right (unless we want to guess based on the size of the adjustment or scrape the html tables, which we don’t) - JDH

2010-06-06 Updated dateutil to 1.5 and pytz to 2010h.

2010-06-02 Add error_kw kwarg to Axes.bar(). - EF

2010-06-01 Fix pcolormesh() and QuadMesh to pass on kwargs as
  appropriate. - RM

2010-05-18 Merge mpl_toolkits.gridspec into the main tree. - JJL

2010-05-04 Improve backend_qt4 so it displays figures with the
  correct size - DSD
2010-04-20 Added generic support for connecting to a timer for events. This
  adds TimerBase, TimerGTK, TimerQT, TimerWx, and TimerTk to the backends and a new_timer() method to each backend’s canvas to allow ease of creating a new timer. - RM

2010-04-20 Added margins() Axes method and pyplot function. - EF

2010-04-18 update the axes_grid documentation. -JJL

2010-04-18 Control MaxNLocator parameters after instantiation,
  and via Axes.locator_params method, with corresponding pyplot function. -EF
2010-04-18 Control ScalarFormatter offsets directly and via the
  Axes.ticklabel_format() method, and add that to pyplot. -EF

2010-04-16 Add a close_event to the backends. -RM

2010-04-06 modify axes_grid examples to use axes_grid1 and axisartist. -JJL

2010-04-06 rebase axes_grid using axes_grid1 and axisartist modules. -JJL

2010-04-06 axes_grid toolkit is splitted into two separate modules,
  axes_grid1 and axisartist. -JJL
2010-04-05 Speed up import: import pytz only if and when it is
  needed. It is not needed if the rc timezone is UTC. - EF
2010-04-03 Added color kwarg to Axes.hist(), based on work by
  Jeff Klukas. - EF
2010-03-24 refactor colorbar code so that no cla() is necessary when
  mappable is changed. -JJL
2010-03-22 fix incorrect rubber band during the zoom mode when mouse
  leaves the axes. -JJL

2010-03-21 x/y key during the zoom mode only changes the x/y limits. -JJL

2010-03-20 Added pyplot.sca() function suggested by JJL. - EF

2010-03-20 Added conditional support for new Tooltip API in gtk backend. - EF

2010-03-20 Changed plt.fig_subplot() to plt.subplots() after discussion on
  list, and changed its API to return axes as a numpy object array (with control of dimensions via squeeze keyword). FP.

2010-03-13 Manually brought in commits from branch:

      ------------------------------------------------------------------------
      r8191 | leejjoon | 2010-03-13 17:27:57 -0500 (Sat, 13 Mar 2010) | 1 line

    fix the bug that handles for scatter are incorrectly set when dpi!=72.
    Thanks to Ray Speth for the bug report.

2010-03-03 Manually brought in commits from branch via diff/patch (svnmerge is broken):

    ------------------------------------------------------------------------
    r8175 | leejjoon | 2010-03-03 10:03:30 -0800 (Wed, 03 Mar 2010) | 1 line

    fix arguments of allow_rasterization.draw_wrapper
    ------------------------------------------------------------------------
    r8174 | jdh2358 | 2010-03-03 09:15:58 -0800 (Wed, 03 Mar 2010) | 1 line

    added support for favicon in docs build
    ------------------------------------------------------------------------
    r8173 | jdh2358 | 2010-03-03 08:56:16 -0800 (Wed, 03 Mar 2010) | 1 line

    applied Mattias get_bounds patch
    ------------------------------------------------------------------------
    r8172 | jdh2358 | 2010-03-03 08:31:42 -0800 (Wed, 03 Mar 2010) | 1 line

    fix svnmerge download instructions
    ------------------------------------------------------------------------
    r8171 | jdh2358 | 2010-03-03 07:47:48 -0800 (Wed, 03 Mar 2010) | 1 line

2010-02-25 add annotation_demo3.py that demonstrates new functionality. -JJL

2010-02-25 refactor Annotation to support arbitrary Transform as xycoords
  or textcoords. Also, if a tuple of two coordinates is provided, they are interpreted as coordinates for each x and y position. -JJL
2010-02-24 Added pyplot.fig_subplot(), to create a figure and a group of
  subplots in a single call. This offers an easier pattern than manually making figures and calling add_subplot() multiple times. FP
2010-02-17 Added Gokhan’s and Mattias’ customizable keybindings patch
  for the toolbar. You can now set the keymap.* properties in the matplotlibrc file. Newbindings were added for toggling log scaling on the x-axis. JDH
2010-02-16 Committed TJ’s filled marker patch for
  left|right|bottom|top|full filled markers. See examples/pylab_examples/filledmarker_demo.py. JDH
2010-02-11 Added ‘bootstrap’ option to boxplot. This allows bootstrap
  estimates of median confidence intervals. Based on an initial patch by Paul Hobson. - ADS
2010-02-06 Added setup.cfg “basedirlist” option to override setting
  in setupext.py “basedir” dictionary; added “gnu0” platform requested by Benjamin Drung. - EF

2010-02-06 Added ‘xy’ scaling option to EllipseCollection. - EF

2010-02-03 Made plot_directive use a custom PlotWarning category, so that
  warnings can be turned into fatal errors easily if desired. - FP
2010-01-29 Added draggable method to Legend to allow mouse drag
  placement. Thanks Adam Fraser. JDH
2010-01-25 Fixed a bug reported by Olle Engdegard, when using
  histograms with stepfilled and log=True - MM

2010-01-16 Upgraded CXX to 6.1.1 - JDH

2009-01-16 Don’t create minor ticks on top of existing major
  ticks. Patch by Neil Crighton. -ADS
2009-01-16 Ensure three minor ticks always drawn (SF# 2924245). Patch
  by Neil Crighton. -ADS
2010-01-16 Applied patch by Ian Thomas to fix two contouring
  problems: now contourf handles interior masked regions, and the boundaries of line and filled contours coincide. - EF
2009-01-11 The color of legend patch follows the rc parameters
  axes.facecolor and axes.edgecolor. -JJL
2009-01-11 adjustable of Axes can be “box-forced” which allow
  sharing axes. -JJL
2009-01-11 Add add_click and pop_click methods in
  BlockingContourLabeler. -JJL

2010-01-03 Added rcParams[‘axes.color_cycle’] - EF

2010-01-03 Added Pierre’s qt4 formlayout editor and toolbar button - JDH

2009-12-31 Add support for using math text as marker symbols (Thanks to tcb)
  - MGD

2009-12-31 Commit a workaround for a regression in PyQt4-4.6.{0,1} - DSD

2009-12-22 Fix cmap data for gist_earth_r, etc. -JJL

2009-12-20 spines: put spines in data coordinates, add set_bounds()
  call. -ADS
2009-12-18 Don’t limit notch size in boxplot to q1-q3 range, as this
  is effectively making the data look better than it is. - ADS
2009-12-18 mlab.prctile handles even-length data, such that the median
  is the mean of the two middle values. - ADS

2009-12-15 Add raw-image (unsampled) support for the ps backend. - JJL

2009-12-14 Add patch_artist kwarg to boxplot, but keep old default.
  Convert boxplot_demo2.py to use the new patch_artist. - ADS
2009-12-06 axes_grid: reimplemented AxisArtist with FloatingAxes support.
  Added new examples. - JJL
2009-12-01 Applied Laurent Dufrechou’s patch to improve blitting with
  the qt4 backend - DSD
2009-11-13 The pdf backend now allows changing the contents of
  a pdf file’s information dictionary via PdfPages.infodict. - JKS
2009-11-12 font_manager.py should no longer cause EINTR on Python 2.6
  (but will on the 2.5 version of subprocess). Also the fc-list command in that file was fixed so now it should actually find the list of fontconfig fonts. - JKS
2009-11-10 Single images, and all images in renderers with
  option_image_nocomposite (i.e. agg, macosx and the svg backend when rcParams[‘svg.image_noscale’] is True), are now drawn respecting the zorder relative to other artists. (Note that there may now be inconsistencies across backends when more than one image is drawn at varying zorders, but this change introduces correct behavior for the backends in which it’s easy to do so.)
2009-10-21 Make AutoDateLocator more configurable by adding options
  to control the maximum and minimum number of ticks. Also add control of the intervals to be used for ticking. This does not change behavior but opens previously hard-coded behavior to runtime modification`. - RMM
2009-10-19 Add “path_effects” support for Text and Patch. See
  examples/pylab_examples/patheffect_demo.py -JJL
2009-10-19 Add “use_clabeltext” option to clabel. If True, clabels
  will be created with ClabelText class, which recalculates rotation angle of the label during the drawing time. -JJL
2009-10-16 Make AutoDateFormatter actually use any specified
  timezone setting.This was only working correctly when no timezone was specified. - RMM

2009-09-27 Beginnings of a capability to test the pdf backend. - JKS

2009-09-27 Add a savefig.extension rcparam to control the default
  filename extension used by savefig. - JKS

2009-09-21 Tagged for release 0.99.1

2009-09-20 Fix usetex spacing errors in pdf backend. - JKS

2009-09-20 Add Sphinx extension to highlight IPython console sessions,
  originally authored (I think) by Michael Droetboom. - FP
2009-09-20 Fix off-by-one error in dviread.Tfm, and additionally protect
  against exceptions in case a dvi font is missing some metrics. - JKS
2009-09-15 Implement draw_text and draw_tex method of backend_base using
  the textpath module. Implement draw_tex method of the svg backend. - JJL

2009-09-15 Don’t fail on AFM files containing floating-point bounding boxes - JKS

2009-09-13 AxesGrid : add modified version of colorbar. Add colorbar
  location howto. - JJL
2009-09-07 AxesGrid : implemented axisline style.
  Added a demo examples/axes_grid/demo_axisline_style.py- JJL
2009-09-04 Make the textpath class as a separate moduel
  (textpath.py). Add support for mathtext and tex.- JJL
2009-09-01 Added support for Gouraud interpolated triangles.
  pcolormesh now accepts shading=’gouraud’ as an option. - MGD
2009-08-29 Added matplotlib.testing package, which contains a Nose
  plugin and a decorator that lets tests be marked as KnownFailures - ADS
2009-08-20 Added scaled dict to AutoDateFormatter for customized
  scales - JDH
2009-08-15 Pyplot interface: the current image is now tracked at the
  figure and axes level, addressing tracker item 1656374. - EF
2009-08-15 Docstrings are now manipulated with decorators defined
  in a new module, docstring.py, thanks to Jason Coombs. - EF
2009-08-14 Add support for image filtering for agg back end. See the example
  demo_agg_filter.py. -JJL
2009-08-09 AnnotationBbox added. Similar to Annotation, but works with
  OffsetBox instead of Text. See the example demo_annotation_box.py. -JJL
2009-08-07 BboxImage implemented. Two examples, demo_bboximage.py and
  demo_ribbon_box.py added. - JJL
2009-08-07 In an effort to simplify the backend API, all clipping rectangles

  and paths are now passed in using GraphicsContext objects, even on collections and images. Therefore:

  > draw_path_collection(self, master_transform, cliprect, clippath,

  >   clippath_trans, paths, all_transforms, offsets, offsetTrans, facecolors, edgecolors, linewidths, linestyles, antialiaseds, urls)

  >   > becomes:

  > draw_path_collection(self, gc, master_transform, paths, all_transforms,
  >   offsets, offsetTrans, facecolors, edgecolors, linewidths, linestyles, antialiaseds, urls)
  > draw_quad_mesh(self, master_transform, cliprect, clippath,

  >   clippath_trans, meshWidth, meshHeight, coordinates, offsets, offsetTrans, facecolors, antialiased, showedges)

  >   > becomes:

  > draw_quad_mesh(self, gc, master_transform, meshWidth, meshHeight,
  >   coordinates, offsets, offsetTrans, facecolors, antialiased, showedges)

  > draw_image(self, x, y, im, bbox, clippath=None, clippath_trans=None)

  > > becomes:

  > draw_image(self, gc, x, y, im)

  - MGD

2009-08-06 Tagging the 0.99.0 release at svn r7397 - JDH

> - fixed an alpha colormapping bug posted on sf 2832575
> - fix typo in axes_divider.py. use nanmin, nanmax in angle_helper.py (patch by Christoph Gohlke)
> - remove dup gui event in enter/leave events in gtk
> - lots of fixes for os x binaries (Thanks Russell Owen)
> - attach gtk events to mpl events – fixes sf bug 2816580
> - applied sf patch 2815064 (middle button events for wx) and patch 2818092 (resize events for wx)
> - fixed boilerplate.py so it doesn’t break the ReST docs.
> - removed a couple of cases of mlab.load
> - fixed rec2csv win32 file handle bug from sf patch 2831018
> - added two examples from Josh Hemann: examples/pylab_examples/barchart_demo2.py and examples/pylab_examples/boxplot_demo2.py
> - handled sf bugs 2831556 and 2830525; better bar error messages and backend driver configs
> - added miktex win32 patch from sf patch 2820194
> - apply sf patches 2830233 and 2823885 for osx setup and 64 bit; thanks Michiel

2009-08-04 Made cbook.get_sample_data make use of the ETag and Last-Modified
  headers of mod_dav_svn. - JKS
2009-08-03 Add PathCollection; modify contourf to use complex
  paths instead of simple paths with cuts. - EF

2009-08-03 Fixed boilerplate.py so it doesn’t break the ReST docs. - JKS

2009-08-03 pylab no longer provides a load and save function. These
  are available in matplotlib.mlab, or you can use numpy.loadtxt and numpy.savetxt for text files, or np.save and np.load for binary numpy arrays. - JDH
2009-07-31 Added cbook.get_sample_data for urllib enabled fetching and
  cacheing of data needed for examples. See examples/misc/sample_data_demo.py - JDH

2009-07-31 Tagging 0.99.0.rc1 at 7314 - MGD

2009-07-30 Add set_cmap and register_cmap, and improve get_cmap,
  to provide convenient handling of user-generated colormaps. Reorganized _cm and cm modules. - EF

2009-07-28 Quiver speed improved, thanks to tip by Ray Speth. -EF

2009-07-27 Simplify argument handling code for plot method. -EF

2009-07-25 Allow “plot(1, 2, ‘r*’)” to work. - EF

2009-07-22 Added an ‘interp’ keyword to griddata so the faster linear
  interpolation method can be chosen. Default is ‘nn’, so default behavior (using natural neighbor method) is unchanged (JSW)
2009-07-22 Improved boilerplate.py so that it generates the correct
  signatures for pyplot functions. - JKS
2009-07-19 Fixed the docstring of Axes.step to reflect the correct
  meaning of the kwargs “pre” and “post” - See SF bug https://sourceforge.net/tracker/index.php?func=detail&aid=2823304&group_id=80706&atid=560720 - JDH
2009-07-18 Fix support for hatches without color fills to pdf and svg
  backends. Add an example of that to hatch_demo.py. - JKS

2009-07-17 Removed fossils from swig version of agg backend. - EF

2009-07-14 initial submission of the annotation guide. -JJL

2009-07-14 axes_grid : minor improvements in anchored_artists and
  inset_locator. -JJL
2009-07-14 Fix a few bugs in ConnectionStyle algorithms. Add
  ConnectionPatch class. -JJL
2009-07-11 Added a fillstyle Line2D property for half filled markers
  – see examples/pylab_examples/fillstyle_demo.py JDH
2009-07-08 Attempt to improve performance of qt4 backend, do not call
  qApp.processEvents while processing an event. Thanks Ole Streicher for tracking this down - DSD
2009-06-24 Add withheader option to mlab.rec2csv and changed
  use_mrecords default to False in mlab.csv2rec since this is partially broken - JDH
2009-06-24 backend_agg.draw_marker quantizes the main path (as in the
  draw_path). - JJL

2009-06-24 axes_grid: floating axis support added. - JJL

2009-06-14 Add new command line options to backend_driver.py to support
  running only some directories of tests - JKS

2009-06-13 partial cleanup of mlab and its importation in pylab - EF

2009-06-13 Introduce a rotation_mode property for the Text artist. See
  examples/pylab_examples/demo_text_rotation_mode.py -JJL
2009-06-07 add support for bz2 files per sf support request 2794556 -
  JDH
2009-06-06 added a properties method to the artist and inspector to
  return a dict mapping property name -> value; see sf feature request 2792183 - JDH

2009-06-06 added Neil’s auto minor tick patch; sf patch #2789713 - JDH

2009-06-06 do not apply alpha to rgba color conversion if input is
  already rgba - JDH
2009-06-03 axes_grid : Initial check-in of curvelinear grid support. See
  examples/axes_grid/demo_curvelinear_grid.py - JJL

2009-06-01 Add set_color method to Patch - EF

2009-06-01 Spine is now derived from Patch - ADS

2009-06-01 use cbook.is_string_like() instead of isinstance() for spines - ADS

2009-06-01 cla() support for spines - ADS

2009-06-01 Removed support for gtk < 2.4. - EF

2009-05-29 Improved the animation_blit_qt4 example, which was a mix
  of the object-oriented and pylab interfaces. It is now strictly object-oriented - DSD

2009-05-28 Fix axes_grid toolkit to work with spine patch by ADS. - JJL

2009-05-28 Applied fbianco’s patch to handle scroll wheel events in
  the qt4 backend - DSD

2009-05-26 Add support for “axis spines” to have arbitrary location. -ADS

2009-05-20 Add an empty matplotlibrc to the tests/ directory so that running
  tests will use the default set of rcparams rather than the user’s config. - RMM
2009-05-19 Axis.grid(): allow use of which=’major,minor’ to have grid
  on major and minor ticks. -ADS
2009-05-18 Make psd(), csd(), and cohere() wrap properly for complex/two-sided
  versions, like specgram() (SF #2791686) - RMM
2009-05-18 Fix the linespacing bug of multiline text (#1239682). See
  examples/pylab_examples/multiline.py -JJL
2009-05-18 Add annotation_clip attr. for text.Annotation class.
  If True, annotation is only drawn when the annotated point is inside the axes area. -JJL
2009-05-17 Fix bug(#2749174) that some properties of minor ticks are
  not conserved -JJL
2009-05-17 applied Michiel’s sf patch 2790638 to turn off gtk event
  loop in setupext for pygtk>=2.15.10 - JDH
2009-05-17 applied Michiel’s sf patch 2792742 to speed up Cairo and
  macosx collections; speedups can be 20x. Also fixes some bugs in which gc got into inconsistent state

2008-05-17 Release 0.98.5.3 at r7107 from the branch - JDH

2009-05-13 An optional offset and bbox support in restore_bbox.
  Add animation_blit_gtk2.py. -JJL
2009-05-13 psfrag in backend_ps now uses baseline-alignment
  when preview.sty is used ((default is bottom-alignment). Also, a small api imporvement in OffsetBox-JJL
2009-05-13 When the x-coordinate of a line is monotonically
  increasing, it is now automatically clipped at the stage of generating the transformed path in the draw method; this greatly speeds up zooming and panning when one is looking at a short segment of a long time series, for example. - EF

2009-05-11 aspect=1 in log-log plot gives square decades. -JJL

2009-05-08 clabel takes new kwarg, rightside_up; if False, labels
  will not be flipped to keep them rightside-up. This allows the use of clabel to make streamfunction arrows, as requested by Evan Mason. - EF
2009-05-07 ‘labelpad’ can now be passed when setting x/y labels. This
  allows controlling the spacing between the label and its axis. - RMM
2009-05-06 print_ps now uses mixed-mode renderer. Axes.draw rasterize
  artists whose zorder smaller than rasterization_zorder. -JJL

2009-05-06 Per-artist Rasterization, originally by Eric Bruning. -JJ

2009-05-05 Add an example that shows how to make a plot that updates
  using data from another process. Thanks to Robert Cimrman - RMM

2009-05-05 Add Axes.get_legend_handles_labels method. - JJL

2009-05-04 Fix bug that Text.Annotation is still drawn while set to
  not visible. - JJL

2009-05-04 Added TJ’s fill_betweenx patch - JDH

2009-05-02 Added options to plotfile based on question from
  Joseph Smidt and patch by Matthias Michler. - EF
2009-05-01 Changed add_artist and similar Axes methods to
  return their argument. - EF

2009-04-30 Incorrect eps bbox for landscape mode fixed - JJL

2009-04-28 Fixed incorrect bbox of eps output when usetex=True. - JJL

2009-04-24 Changed use of os.open* to instead use subprocess.Popen.
  os.popen* are deprecated in 2.6 and are removed in 3.0. - RMM
2009-04-20 Worked on axes_grid documentation. Added
  axes_grid.inset_locator. - JJL

2009-04-17 Initial check-in of the axes_grid toolkit. - JJL

2009-04-17 Added a support for bbox_to_anchor in
  offsetbox.AnchoredOffsetbox. Improved a documentation. - JJL
2009-04-16 Fixed a offsetbox bug that multiline texts are not
  correctly aligned. - JJL
2009-04-16 Fixed a bug in mixed mode renderer that images produced by
  an rasterizing backend are placed with incorrect size. - JJL
2009-04-14 Added Jonathan Taylor’s Reinier Heeres’ port of John
  Porters’ mplot3d to svn trunk. Package in mpl_toolkits.mplot3d and demo is examples/mplot3d/demo.py. Thanks Reiner
2009-04-06 The pdf backend now escapes newlines and linefeeds in strings.
  Fixes sf bug #2708559; thanks to Tiago Pereira for the report.
2009-04-06 texmanager.make_dvi now raises an error if LaTeX failed to
  create an output file. Thanks to Joao Luis Silva for reporting this. - JKS
2009-04-05 _png.read_png() reads 12 bit PNGs (patch from
  Tobias Wood) - ADS
2009-04-04 Allow log axis scale to clip non-positive values to
  small positive value; this is useful for errorbars. - EF
2009-03-28 Make images handle nan in their array argument.
  A helper, cbook.safe_masked_invalid() was added. - EF

2009-03-25 Make contour and contourf handle nan in their Z argument. - EF

2009-03-20 Add AuxTransformBox in offsetbox.py to support some transformation.
  anchored_text.py example is enhanced and renamed (anchored_artists.py). - JJL

2009-03-20 Add “bar” connection style for annotation - JJL

2009-03-17 Fix bugs in edge color handling by contourf, found
  by Jae-Joon Lee. - EF
2009-03-14 Added ‘LightSource’ class to colors module for
  creating shaded relief maps. shading_example.py added to illustrate usage. - JSW
2009-03-11 Ensure wx version >= 2.8; thanks to Sandro Tosi and
  Chris Barker. - EF

2009-03-10 Fix join style bug in pdf. - JKS

2009-03-07 Add pyplot access to figure number list - EF

2009-02-28 hashing of FontProperties accounts current rcParams - JJL

2009-02-28 Prevent double-rendering of shared axis in twinx, twiny - EF

2009-02-26 Add optional bbox_to_anchor argument for legend class - JJL

2009-02-26 Support image clipping in pdf backend. - JKS

2009-02-25 Improve tick location subset choice in FixedLocator. - EF

2009-02-24 Deprecate numerix, and strip out all but the numpy
  part of the code. - EF
2009-02-21 Improve scatter argument handling; add an early error
  message, allow inputs to have more than one dimension. - EF
2009-02-16 Move plot_directive.py to the installed source tree. Add
  support for inline code content - MGD
2009-02-16 Move mathmpl.py to the installed source tree so it is
  available to other projects. - MGD

2009-02-14 Added the legend title support - JJL

2009-02-10 Fixed a bug in backend_pdf so it doesn’t break when the setting
  pdf.use14corefonts=True is used. Added test case in unit/test_pdf_use14corefonts.py. - NGR
2009-02-08 Added a new imsave function to image.py and exposed it in
  the pyplot interface - GR
2009-02-04 Some reorgnization of the legend code. anchored_text.py
  added as an example. - JJL

2009-02-04 Add extent keyword arg to hexbin - ADS

2009-02-04 Fix bug in mathtext related to dots and ldots - MGD

2009-02-03 Change default joinstyle to round - MGD

2009-02-02 Reduce number of marker XObjects in pdf output - JKS

2009-02-02 Change default resolution on polar plot to 1 - MGD

2009-02-02 Avoid malloc errors in ttconv for fonts that don’t have
  e.g., PostName (a version of Tahoma triggered this) - JKS
2009-01-30 Remove support for pyExcelerator in exceltools – use xlwt
  instead - JDH
2009-01-29 Document ‘resolution’ kwarg for polar plots. Support it
  when using pyplot.polar, not just Figure.add_axes. - MGD
2009-01-29 Rework the nan-handling/clipping/quantizing/simplification
  framework so each is an independent part of a pipeline. Expose the C++-implementation of all of this so it can be used from all Python backends. Add rcParam “path.simplify_threshold” to control the threshold of similarity below which vertices will be removed.

2009-01-26 Improved tight bbox option of the savefig. - JJL

2009-01-26 Make curves and NaNs play nice together - MGD

2009-01-21 Changed the defaults of acorr and xcorr to use
  usevlines=True, maxlags=10 and normed=True since these are the best defaults

2009-01-19 Fix bug in quiver argument handling. - EF

2009-01-19 Fix bug in backend_gtk: don’t delete nonexistent toolbar. - EF

2009-01-16 Implement bbox_inches option for savefig. If bbox_inches is
  “tight”, try to determine the tight bounding box. - JJL
2009-01-16 Fix bug in is_string_like so it doesn’t raise an
  unnecessary exception. - EF
2009-01-16 Fix an infinite recursion in the unit registry when searching
  for a converter for a sequence of strings. Add a corresponding test. - RM
2009-01-16 Bugfix of C typedef of MPL_Int64 that was failing on
  Windows XP 64 bit, as reported by George Goussard on numpy mailing list. - ADS
2009-01-16 Added helper function LinearSegmentedColormap.from_list to
  facilitate building simple custom colomaps. See examples/pylab_examples/custom_cmap_fromlist.py - JDH
2009-01-16 Applied Michiel’s patch for macosx backend to fix rounding
  bug. Closed sf bug 2508440 - JSW
2009-01-10 Applied Michiel’s hatch patch for macosx backend and
  draw_idle patch for qt. Closes sf patched 2497785 and 2468809 - JDH

2009-01-10 Fix bug in pan/zoom with log coordinates. - EF

2009-01-06 Fix bug in setting of dashed negative contours. - EF

2009-01-06 Be fault tolerant when len(linestyles)>NLev in contour. - MM

2009-01-06 Added marginals kwarg to hexbin to plot marginal densities
  JDH
2009-01-06 Change user-visible multipage pdf object to PdfPages to
  avoid accidents with the file-like PdfFile. - JKS

2009-01-05 Fix a bug in pdf usetex: allow using non-embedded fonts. - JKS

2009-01-05 optional use of preview.sty in usetex mode. - JJL

2009-01-02 Allow multipage pdf files. - JKS

2008-12-31 Improve pdf usetex by adding support for font effects
  (slanting and extending). - JKS
2008-12-29 Fix a bug in pdf usetex support, which occurred if the same
  Type-1 font was used with different encodings, e.g., with Minion Pro and MnSymbol. - JKS

2008-12-20 fix the dpi-dependent offset of Shadow. - JJL

2008-12-20 fix the hatch bug in the pdf backend. minor update
  in docs and example - JJL
2008-12-19 Add axes_locator attribute in Axes. Two examples are added.
  - JJL
2008-12-19 Update Axes.legend documnetation. /api/api_changes.rst is also
  updated to describe chages in keyword parameters. Issue a warning if old keyword parameters are used. - JJL

2008-12-18 add new arrow style, a line + filled triangles. -JJL

2008-12-18 Re-Released 0.98.5.2 from v0_98_5_maint at r6679
  Released 0.98.5.2 from v0_98_5_maint at r6667

2008-12-18 Removed configobj, experimental traits and doc/mpl_data link - JDH

2008-12-18 Fix bug where a line with NULL data limits prevents
  subsequent data limits from calculating correctly - MGD

2008-12-17 Major documentation generator changes - MGD

2008-12-17 Applied macosx backend patch with support for path
  collections, quadmesh, etc… - JDH
2008-12-17 fix dpi-dependent behavior of text bbox and arrow in annotate
  -JJL
2008-12-17 Add group id support in artist. Two examples which
  demostrate svg filter are added. -JJL

2008-12-16 Another attempt to fix dpi-dependent behavior of Legend. -JJL

2008-12-16 Fixed dpi-dependent behavior of Legend and fancybox in Text.

2008-12-16 Added markevery property to Line2D to support subsampling
  of markers - JDH
2008-12-15 Removed mpl_data symlink in docs. On platforms that do not
  support symlinks, these become copies, and the font files are large, so the distro becomes unneccessarily bloaded. Keeping the mpl_examples dir because relative links are harder for the plot directive and the *.py files are not so large. - JDH
2008-12-15 Fix $ in non-math text with usetex off. Document
  differences between usetex on/off - MGD

2008-12-15 Fix anti-aliasing when auto-snapping - MGD

2008-12-15 Fix grid lines not moving correctly during pan and zoom - MGD

2008-12-12 Preparations to eliminate maskedarray rcParams key: its
  use will now generate a warning. Similarly, importing the obsolote numerix.npyma will generate a warning. - EF
2008-12-12 Added support for the numpy.histogram() weights parameter
  to the axes hist() method. Docs taken from numpy - MM

2008-12-12 Fixed warning in hist() with numpy 1.2 - MM

2008-12-12 Removed external packages: configobj and enthought.traits

  which are only required by the experimental traited config and are somewhat out of date. If needed, install them independently, see:

  http://code.enthought.com/projects/traits

  and:

  http://www.voidspace.org.uk/python/configobj.html

2008-12-12 Added support to asign labels to histograms of multiple
  data. - MM

2008-12-11 Released 0.98.5 at svn r6573

2008-12-11 Use subprocess.Popen instead of os.popen in dviread
  (Windows problem reported by Jorgen Stenarson) - JKS
2008-12-10 Added Michael’s font_manager fix and Jae-Joon’s
  figure/subplot fix. Bumped version number to 0.98.5 - JDH

2008-12-09 Released 0.98.4 at svn r6536

2008-12-08 Added mdehoon’s native macosx backend from sf patch 2179017 - JDH

2008-12-08 Removed the prints in the set_*style commands. Return the
  list of pprinted strings instead - JDH
2008-12-08 Some of the changes Michael made to improve the output of
  the property tables in the rest docs broke of made difficult to use some of the interactive doc helpers, e.g., setp and getp. Having all the rest markup in the ipython shell also confused the docstrings. I added a new rc param docstring.harcopy, to format the docstrings differently for hardcopy and other use. Ther ArtistInspector could use a little refactoring now since there is duplication of effort between the rest out put and the non-rest output - JDH
2008-12-08 Updated spectral methods (psd, csd, etc.) to scale one-sided
  densities by a factor of 2 and, optionally, scale all densities by the sampling frequency. This gives better MatLab compatibility. -RM

2008-12-08 Fixed alignment of ticks in colorbars. -MGD

2008-12-07 drop the deprecated “new” keyword of np.histogram() for
  numpy 1.2 or later. -JJL
2008-12-06 Fixed a bug in svg backend that new_figure_manager()
  ignores keywords arguments such as figsize, etc. -JJL
2008-12-05 Fixed a bug that the handlelength of the new legend class
  set too short when numpoints=1 -JJL
2008-12-04 Added support for data with units (e.g., dates) to
  Axes.fill_between. -RM
2008-12-04 Added fancybox keyword to legend. Also applied some changes
  for better look, including baseline adjustment of the multiline texts so that it is center aligned. -JJL
2008-12-02 The transmuter classes in the patches.py are reorganized as
  subclasses of the Style classes. A few more box and arrow styles are added. -JJL
2008-12-02 Fixed a bug in the new legend class that didn’t allowed
  a tuple of coordinate vlaues as loc. -JJL
2008-12-02 Improve checks for external dependencies, using subprocess
  (instead of deprecated popen*) and distutils (for version checking) - DSD
2008-11-30 Reimplementation of the legend which supports baseline alignement,
  multi-column, and expand mode. - JJL
2008-12-01 Fixed histogram autoscaling bug when bins or range are given
  explicitly (fixes Debian bug 503148) - MM
2008-11-25 Added rcParam axes.unicode_minus which allows plain hypen
  for minus when False - JDH
2008-11-25 Added scatterpoints support in Legend. patch by Erik
  Tollerud - JJL

2008-11-24 Fix crash in log ticking. - MGD

2008-11-20 Added static helper method BrokenHBarCollection.span_where
  and Axes/pyplot method fill_between. See examples/pylab/fill_between.py - JDH
2008-11-12 Add x_isdata and y_isdata attributes to Artist instances,
  and use them to determine whether either or both coordinates are used when updating dataLim. This is used to fix autoscaling problems that had been triggered by axhline, axhspan, axvline, axvspan. - EF
2008-11-11 Update the psd(), csd(), cohere(), and specgram() methods
  of Axes and the csd() cohere(), and specgram() functions in mlab to be in sync with the changes to psd(). In fact, under the hood, these all call the same core to do computations. - RM
2008-11-11 Add ‘pad_to’ and ‘sides’ parameters to mlab.psd() to
  allow controlling of zero padding and returning of negative frequency components, respecitively. These are added in a way that does not change the API. - RM
2008-11-10 Fix handling of c kwarg by scatter; generalize
  is_string_like to accept numpy and numpy.ma string array scalars. - RM and EF
2008-11-09 Fix a possible EINTR problem in dviread, which might help
  when saving pdf files from the qt backend. - JKS

2008-11-05 Fix bug with zoom to rectangle and twin axes - MGD

2008-10-24 Added Jae Joon’s fancy arrow, box and annotation
  enhancements – see examples/pylab_examples/annotation_demo2.py

2008-10-23 Autoscaling is now supported with shared axes - EF

2008-10-23 Fixed exception in dviread that happened with Minion - JKS

2008-10-21 set_xlim, ylim now return a copy of the viewlim array to
  avoid modify inplace surprises
2008-10-20 Added image thumbnail generating function
  matplotlib.image.thumbnail. See examples/misc/image_thumbnail.py - JDH
2008-10-20 Applied scatleg patch based on ideas and work by Erik
  Tollerud and Jae-Joon Lee. - MM
2008-10-11 Fixed bug in pdf backend: if you pass a file object for
  output instead of a filename, e.g., in a wep app, we now flush the object at the end. - JKS

2008-10-08 Add path simplification support to paths with gaps. - EF

2008-10-05 Fix problem with AFM files that don’t specify the font’s
  full name or family name. - JKS
2008-10-04 Added ‘scilimits’ kwarg to Axes.ticklabel_format() method,
  for easy access to the set_powerlimits method of the major ScalarFormatter. - EF
2008-10-04 Experimental new kwarg borderpad to replace pad in legend,
  based on suggestion by Jae-Joon Lee. - EF
2008-09-27 Allow spy to ignore zero values in sparse arrays, based
  on patch by Tony Yu. Also fixed plot to handle empty data arrays, and fixed handling of markers in figlegend. - EF
2008-09-24 Introduce drawstyles for lines. Transparently split linestyles
  like ‘steps–’ into drawstyle ‘steps’ and linestyle ‘–’. Legends always use drawstyle ‘default’. - MM
2008-09-18 Fixed quiver and quiverkey bugs (failure to scale properly
  when resizing) and added additional methods for determining the arrow angles - EF

2008-09-18 Fix polar interpolation to handle negative values of theta - MGD

2008-09-14 Reorganized cbook and mlab methods related to numerical
  calculations that have little to do with the goals of those two modules into a separate module numerical_methods.py Also, added ability to select points and stop point selection with keyboard in ginput and manual contour labeling code. Finally, fixed contour labeling bug. - DMK

2008-09-11 Fix backtick in Postscript output. - MGD

2008-09-10 [ 2089958 ] Path simplification for vector output backends
  Leverage the simplification code exposed through path_to_polygons to simplify certain well-behaved paths in the vector backends (PDF, PS and SVG). “path.simplify” must be set to True in matplotlibrc for this to work. - MGD
2008-09-10 Add “filled” kwarg to Path.intersects_path and
  Path.intersects_bbox. - MGD
2008-09-07 Changed full arrows slightly to avoid an xpdf rendering
  problem reported by Friedrich Hagedorn. - JKS
2008-09-07 Fix conversion of quadratic to cubic Bezier curves in PDF
  and PS backends. Patch by Jae-Joon Lee. - JKS

2008-09-06 Added 5-point star marker to plot command - EF

2008-09-05 Fix hatching in PS backend - MGD

2008-09-03 Fix log with base 2 - MGD

2008-09-01 Added support for bilinear interpolation in
  NonUniformImage; patch by Gregory Lielens. - EF
2008-08-28 Added support for multiple histograms with data of
  different length - MM

2008-08-28 Fix step plots with log scale - MGD

2008-08-28 Fix masked arrays with markers in non-Agg backends - MGD

2008-08-28 Fix clip_on kwarg so it actually works correctly - MGD

2008-08-25 Fix locale problems in SVG backend - MGD

2008-08-22 fix quiver so masked values are not plotted - JSW

2008-08-18 improve interactive pan/zoom in qt4 backend on windows - DSD

2008-08-11 Fix more bugs in NaN/inf handling. In particular, path simplification
  (which does not handle NaNs or infs) will be turned off automatically when infs or NaNs are present. Also masked arrays are now converted to arrays with NaNs for consistent handling of masks and NaNs - MGD and EF

2008-08-03 Released 0.98.3 at svn r5947

2008-08-01 Backported memory leak fixes in _ttconv.cpp - MGD

2008-07-31 Added masked array support to griddata. - JSW

2008-07-26 Added optional C and reduce_C_function arguments to
  axes.hexbin(). This allows hexbin to accumulate the values of C based on the x,y coordinates and display in hexagonal bins. - ADS
2008-07-24 Deprecated (raise NotImplementedError) all the mlab2
  functions from matplotlib.mlab out of concern that some of them were not clean room implementations. JDH
2008-07-24 Rewrite of a significant portion of the clabel code (class
  ContourLabeler) to improve inlining. - DMK
2008-07-22 Added Barbs polygon collection (similar to Quiver) for plotting
  wind barbs. Added corresponding helpers to Axes and pyplot as well. (examples/pylab_examples/barb_demo.py shows it off.) - RMM
2008-07-21 Added scikits.delaunay as matplotlib.delaunay. Added griddata
  function in matplotlib.mlab, with example (griddata_demo.py) in pylab_examples. griddata function will use mpl_toolkits._natgrid if installed. - JSW
2008-07-21 Re-introduced offset_copy that works in the context of the
  new transforms. - MGD
2008-07-21 Committed patch by Ryan May to add get_offsets and
  set_offsets to Collections base class - EF
2008-07-21 Changed the “asarray” strategy in image.py so that
  colormapping of masked input should work for all image types (thanks Klaus Zimmerman) - EF
2008-07-20 Rewrote cbook.delete_masked_points and corresponding
  unit test to support rgb color array inputs, datetime inputs, etc. - EF
2008-07-20 Renamed unit/axes_unit.py to cbook_unit.py and modified
  in accord with Ryan’s move of delete_masked_points from axes to cbook. - EF
2008-07-18 Check for nan and inf in axes.delete_masked_points().
  This should help hexbin and scatter deal with nans. - ADS
2008-07-17 Added ability to manually select contour label locations.
  Also added a waitforbuttonpress function. - DMK
2008-07-17 Fix bug with NaNs at end of path (thanks, Andrew Straw for
  the report) - MGD
2008-07-16 Improve error handling in texmanager, thanks to Ian Henry
  for reporting - DSD
2008-07-12 Added support for external backends with the
  “module://my_backend” syntax - JDH
2008-07-11 Fix memory leak related to shared axes. Grouper should
  store weak references. - MGD

2008-07-10 Bugfix: crash displaying fontconfig pattern - MGD

2008-07-10 Bugfix: [ 2013963 ] update_datalim_bounds in Axes not works - MGD

2008-07-10 Bugfix: [ 2014183 ] multiple imshow() causes gray edges - MGD

2008-07-09 Fix rectangular axes patch on polar plots bug - MGD

2008-07-09 Improve mathtext radical rendering - MGD

2008-07-08 Improve mathtext superscript placement - MGD

2008-07-07 Fix custom scales in pcolormesh (thanks Matthew Turk) - MGD

2008-07-03 Implemented findobj method for artist and pyplot - see
  examples/pylab_examples/findobj_demo.py - JDH

2008-06-30 Another attempt to fix TextWithDash - DSD

2008-06-30 Removed Qt4 NavigationToolbar2.destroy – it appears to
  have been unnecessary and caused a bug reported by P. Raybaut - DSD

2008-06-27 Fixed tick positioning bug - MM

2008-06-27 Fix dashed text bug where text was at the wrong end of the
  dash - MGD

2008-06-26 Fix mathtext bug for expressions like $x_{leftarrow}$ - MGD

2008-06-26 Fix direction of horizontal/vertical hatches - MGD

2008-06-25 Figure.figurePatch renamed Figure.patch, Axes.axesPatch
  renamed Axes.patch, Axes.axesFrame renamed Axes.frame, Axes.get_frame, which returns Axes.patch, is deprecated. Examples and users guide updated - JDH

2008-06-25 Fix rendering quality of pcolor - MGD

2008-06-24 Released 0.98.2 at svn r5667 - (source only for debian) JDH

2008-06-24 Added “transparent” kwarg to savefig. - MGD

2008-06-24 Applied Stefan’s patch to draw a single centered marker over
  a line with numpoints==1 - JDH

2008-06-23 Use splines to render circles in scatter plots - MGD

2008-06-22 Released 0.98.1 at revision 5637

2008-06-22 Removed axes3d support and replaced it with a
  NotImplementedError for one release cycle

2008-06-21 fix marker placement bug in backend_ps - DSD

2008-06-20 [ 1978629 ] scale documentation missing/incorrect for log - MGD

2008-06-20 Added closed kwarg to PolyCollection. Fixes bug [ 1994535
  ] still missing lines on graph with svn (r 5548). - MGD
2008-06-20 Added set/get_closed method to Polygon; fixes error
  in hist - MM
2008-06-19 Use relative font sizes (e.g., ‘medium’ and ‘large’) in
  rcsetup.py and matplotlibrc.template so that text will be scaled by default when changing rcParams[‘font.size’] - EF
2008-06-17 Add a generic PatchCollection class that can contain any
  kind of patch. - MGD
2008-06-13 Change pie chart label alignment to avoid having labels
  overwrite the pie - MGD
2008-06-12 Added some helper functions to the mathtext parser to
  return bitmap arrays or write pngs to make it easier to use mathtext outside the context of an mpl figure. modified the mathpng sphinxext to use the mathtext png save functionality - see examples/api/mathtext_asarray.py - JDH
2008-06-11 Use matplotlib.mathtext to render math expressions in
  online docs - MGD
2008-06-11 Move PNG loading/saving to its own extension module, and
  remove duplicate code in _backend_agg.cpp and _image.cpp that does the same thing - MGD
2008-06-11 Numerous mathtext bugfixes, primarily related to
  dpi-independence - MGD
2008-06-10 Bar now applies the label only to the first patch only, and
  sets ‘_nolegend_’ for the other patch labels. This lets autolegend work as expected for hist and bar - see https://sourceforge.net/tracker/index.php?func=detail&aid=1986597&group_id=80706&atid=560720 JDH
2008-06-10 Fix text baseline alignment bug. [ 1985420 ] Repair of
  baseline alignment in Text._get_layout. Thanks Stan West - MGD
2008-06-09 Committed Gregor’s image resample patch to downsampling
  images with new rcparam image.resample - JDH
2008-06-09 Don’t install Enthought.Traits along with matplotlib. For
  matplotlib developers convenience, it can still be installed by setting an option in setup.cfg while we figure decide if there is a future for the traited config - DSD

2008-06-09 Added range keyword arg to hist() - MM

2008-06-07 Moved list of backends to rcsetup.py; made use of lower
  case for backend names consistent; use validate_backend when importing backends subpackage - EF
2008-06-06 hist() revision, applied ideas proposed by Erik Tollerud and
  Olle Engdegard: make histtype=’step’ unfilled by default and introduce histtype=’stepfilled’; use default color cycle; introduce reverse cumulative histogram; new align keyword - MM
2008-06-06 Fix closed polygon patch and also provide the option to
  not close the polygon - MGD
2008-06-05 Fix some dpi-changing-related problems with PolyCollection,
  as called by Axes.scatter() - MGD
2008-06-05 Fix image drawing so there is no extra space to the right
  or bottom - MGD
2006-06-04 Added a figure title command suptitle as a Figure method
  and pyplot command – see examples/figure_title.py - JDH
2008-06-02 Added support for log to hist with histtype=’step’ and fixed
  a bug for log-scale stacked histograms - MM

2008-05-29 Released 0.98.0 at revision 5314

2008-05-29 matplotlib.image.imread now no longer always returns RGBA
  – if the image is luminance or RGB, it will return a MxN or MxNx3 array if possible. Also uint8 is no longer always forced to float.

2008-05-29 Implement path clipping in PS backend - JDH

2008-05-29 Fixed two bugs in texmanager.py:
  improved comparison of dvipng versions fixed a bug introduced when get_grey method was added - DSD
2008-05-28 Fix crashing of PDFs in xpdf and ghostscript when two-byte
  characters are used with Type 3 fonts - MGD
2008-05-28 Allow keyword args to configure widget properties as
  requested in http://sourceforge.net/tracker/index.php?func=detail&aid=1866207&group_id=80706&atid=560722 - JDH
2008-05-28 Replaced ‘-‘ with u’u2212’ for minus sign as requested in
  http://sourceforge.net/tracker/index.php?func=detail&aid=1962574&group_id=80706&atid=560720
2008-05-28 zero width/height Rectangles no longer influence the
  autoscaler. Useful for log histograms with empty bins - JDH
2008-05-28 Fix rendering of composite glyphs in Type 3 conversion
  (particularly as evidenced in the Eunjin.ttf Korean font) Thanks Jae-Joon Lee for finding this!
2008-05-27 Rewrote the cm.ScalarMappable callback infrastructure to
  use cbook.CallbackRegistry rather than custom callback handling. Amy users of add_observer/notify of the cm.ScalarMappable should uae the cm.ScalarMappable.callbacksSM CallbackRegistry instead. JDH
2008-05-27 Fix TkAgg build on Ubuntu 8.04 (and hopefully a more
  general solution for other platforms, too.)
2008-05-24 Added PIL support for loading images to imread (if PIL is
  available) - JDH
2008-05-23 Provided a function and a method for controlling the
  plot color cycle. - EF
2008-05-23 Major revision of hist(). Can handle 2D arrays and create
  stacked histogram plots; keyword ‘width’ deprecated and rwidth (relative width) introduced; align=’edge’ changed to center of bin - MM
2008-05-22 Added support for ReST-based doumentation using Sphinx.
  Documents are located in doc/, and are broken up into a users guide and an API reference. To build, run the make.py files. Sphinx-0.4 is needed to build generate xml, which will be useful for rendering equations with mathml, use sphinx from svn until 0.4 is released - DSD

2008-05-21 Fix segfault in TkAgg backend - MGD

2008-05-21 Fix a “local variable unreferenced” bug in plotfile - MM

2008-05-19 Fix crash when Windows can not access the registry to
  determine font path [Bug 1966974, thanks Patrik Simons] - MGD
2008-05-16 removed some unneeded code w/ the python 2.4 requirement.
  cbook no longer provides compatibility for reversed, enumerate, set or izip. removed lib/subprocess, mpl1, sandbox/units, and the swig code. This stuff should remain on the maintenance branch for archival purposes. JDH

2008-05-16 Reorganized examples dir - JDH

2008-05-16 Added ‘elinewidth’ keyword arg to errorbar, based on patch
  by Christopher Brown - MM
2008-05-16 Added ‘cumulative’ keyword arg to hist to plot cumulative
  histograms. For normed hists, this is normalized to one - MM

2008-05-15 Fix Tk backend segfault on some machines - MGD

2008-05-14 Don’t use stat on Windows (fixes font embedding problem) - MGD

2008-05-09 Fix /singlequote (‘) in Postscript backend - MGD

2008-05-08 Fix kerning in SVG when embedding character outlines - MGD

2008-05-07 Switched to future numpy histogram semantic in hist - MM

2008-05-06 Fix strange colors when blitting in QtAgg and Qt4Agg - MGD

2008-05-05 pass notify_axes_change to the figure’s add_axobserver
  in the qt backends, like we do for the other backends. Thanks Glenn Jones for the report - DSD

2008-05-02 Added step histograms, based on patch by Erik Tollerud. - MM

2008-05-02 On PyQt <= 3.14 there is no way to determine the underlying
  Qt version. [1851364] - MGD
2008-05-02 Don’t call sys.exit() when pyemf is not found [1924199] -
  MGD
2008-05-02 Update _subprocess.c from upstream Python 2.5.2 to get a
  few memory and reference-counting-related bugfixes. See bug 1949978. - MGD
2008-04-30 Added some record array editing widgets for gtk – see
  examples/rec_edit*.py - JDH

2008-04-29 Fix bug in mlab.sqrtm - MM

2008-04-28 Fix bug in SVG text with Mozilla-based viewers (the symbol
  tag is not supported) - MGD
2008-04-27 Applied patch by Michiel de Hoon to add hexbin
  axes method and pyplot function - EF

2008-04-25 Enforce python >= 2.4; remove subprocess build - EF

2008-04-25 Enforce the numpy requirement at build time - JDH

2008-04-24 Make numpy 1.1 and python 2.3 required when importing
  matplotlib - EF
2008-04-24 Fix compilation issues on VS2003 (Thanks Martin Spacek for
  all the help) - MGD
2008-04-24 Fix sub/superscripts when the size of the font has been
  changed - MGD

2008-04-22 Use “svg.embed_char_paths” consistently everywhere - MGD

2008-04-20 Add support to MaxNLocator for symmetric axis autoscaling. - EF

2008-04-20 Fix double-zoom bug. - MM

2008-04-15 Speed up color mapping. - EF

2008-04-12 Speed up zooming and panning of dense images. - EF

2008-04-11 Fix global font rcParam setting after initialization
  time. - MGD
2008-04-11 Revert commits 5002 and 5031, which were intended to
  avoid an unnecessary call to draw(). 5002 broke saving figures before show(). 5031 fixed the problem created in 5002, but broke interactive plotting. Unnecessary call to draw still needs resolution - DSD
2008-04-07 Improve color validation in rc handling, suggested
  by Lev Givon - EF
2008-04-02 Allow to use both linestyle definition arguments, ‘-‘ and
  ‘solid’ etc. in plots/collections - MM
2008-03-27 Fix saving to Unicode filenames with Agg backend
  (other backends appear to already work…) (Thanks, Christopher Barker) - MGD
2008-03-26 Fix SVG backend bug that prevents copying and pasting in
  Inkscape (thanks Kaushik Ghose) - MGD
2008-03-24 Removed an unnecessary call to draw() in the backend_qt*
  mouseReleaseEvent. Thanks to Ted Drain - DSD
2008-03-23 Fix a pdf backend bug which sometimes caused the outermost
  gsave to not be balanced with a grestore. - JKS
2008-03-20 Fixed a minor bug in ContourSet._process_linestyles when
  len(linestyles)==Nlev - MM
2008-03-19 Changed ma import statements to “from numpy import ma”;
  this should work with past and future versions of numpy, whereas “import numpy.ma as ma” will work only with numpy >= 1.05, and “import numerix.npyma as ma” is obsolete now that maskedarray is replacing the earlier implementation, as of numpy 1.05.
2008-03-14 Removed an apparently unnecessary call to
  FigureCanvasAgg.draw in backend_qt*agg. Thanks to Ted Drain - DSD
2008-03-10 Workaround a bug in backend_qt4agg’s blitting due to a
  buffer width/bbox width mismatch in _backend_agg’s copy_from_bbox - DSD
2008-02-29 Fix class Wx toolbar pan and zoom functions (Thanks Jeff
  Peery) - MGD
2008-02-16 Added some new rec array functionality to mlab
  (rec_summarize, rec2txt and rec_groupby). See examples/rec_groupby_demo.py. Thanks to Tim M for rec2txt.

2008-02-12 Applied Erik Tollerud’s span selector patch - JDH

2008-02-11 Update plotting() doc string to refer to getp/setp. - JKS

2008-02-10 Fixed a problem with square roots in the pdf backend with
  usetex. - JKS

2008-02-08 Fixed minor __str__ bugs so getp(gca()) works. - JKS

2008-02-05 Added getters for title, xlabel, ylabel, as requested
  by Brandon Kieth - EF
2008-02-05 Applied Gael’s ginput patch and created
  examples/ginput_demo.py - JDH
2008-02-03 Expose interpnames, a list of valid interpolation
  methods, as an AxesImage class attribute. - EF
2008-02-03 Added BoundaryNorm, with examples in colorbar_only.py
  and image_masked.py. - EF

2008-02-03 Force dpi=72 in pdf backend to fix picture size bug. - JKS

2008-02-01 Fix doubly-included font problem in Postscript backend - MGD

2008-02-01 Fix reference leak in ft2font Glyph objects. - MGD

2008-01-31 Don’t use unicode strings with usetex by default - DSD

2008-01-31 Fix text spacing problems in PDF backend with some fonts,
  such as STIXGeneral.
2008-01-31 Fix sqrt with radical number (broken by making [ and ]
  work below) - MGD
2008-01-27 Applied Martin Teichmann’s patch to improve the Qt4
  backend. Uses Qt’s builtin toolbars and statusbars. See bug 1828848 - DSD
2008-01-10 Moved toolkits to mpl_toolkits, made mpl_toolkits
  a namespace package - JSWHIT
2008-01-10 Use setup.cfg to set the default parameters (tkagg,
  numpy) when building windows installers - DSD

2008-01-10 Fix bug displaying [ and ] in mathtext - MGD

2008-01-10 Fix bug when displaying a tick value offset with scientific
  notation. (Manifests itself as a warning that the times symbol can not be found). - MGD
2008-01-10 Use setup.cfg to set the default parameters (tkagg,
  numpy) when building windows installers - DSD

2008-01-06 Released 0.91.2 at revision 4802

2007-12-26 Reduce too-late use of matplotlib.use() to a warning
  instead of an exception, for backwards compatibility - EF

2007-12-25 Fix bug in errorbar, identified by Noriko Minakawa - EF

2007-12-25 Changed masked array importing to work with the upcoming
  numpy 1.05 (now the maskedarray branch) as well as with earlier versions. - EF
2007-12-16 rec2csv saves doubles without losing precision. Also, it
  does not close filehandles passed in open. - JDH,ADS
2007-12-13 Moved rec2gtk to matplotlib.toolkits.gtktools and rec2excel
  to matplotlib.toolkits.exceltools - JDH
2007-12-12 Support alpha-blended text in the Agg and Svg backends -
  MGD

2007-12-10 Fix SVG text rendering bug. - MGD

2007-12-10 Increase accuracy of circle and ellipse drawing by using an
  8-piece bezier approximation, rather than a 4-piece one. Fix PDF, SVG and Cairo backends so they can draw paths (meaning ellipses as well). - MGD

2007-12-07 Issue a warning when drawing an image on a non-linear axis. - MGD

2007-12-06 let widgets.Cursor initialize to the lower x and y bounds
  rather than 0,0, which can cause havoc for dates and other transforms - DSD

2007-12-06 updated references to mpl data directories for py2exe - DSD

2007-12-06 fixed a bug in rcsetup, see bug 1845057 - DSD

2007-12-05 Fix how fonts are cached to avoid loading the same one multiple times.
  (This was a regression since 0.90 caused by the refactoring of font_manager.py) - MGD

2007-12-05 Support arbitrary rotation of usetex text in Agg backend. - MGD

2007-12-04 Support ‘|’ as a character in mathtext - MGD

2007-11-27 Released 0.91.1 at revision 4517

2007-11-27 Released 0.91.0 at revision 4478

2007-11-13 All backends now support writing to a file-like object, not
  just a regular file. savefig() can be passed a file-like object in place of a file path. - MGD
2007-11-13 Improved the default backend selection at build time:
  SVG -> Agg -> TkAgg -> WXAgg -> GTK -> GTKAgg. The last usable backend in this progression will be chosen in the default config file. If a backend is defined in setup.cfg, that will be the default backend - DSD
2007-11-13 Improved creation of default config files at build time for
  traited config package - DSD
2007-11-12 Exposed all the build options in setup.cfg. These options are
  read into a dict called “options” by setupext.py. Also, added “-mpl” tags to the version strings for packages provided by matplotlib. Versions provided by mpl will be identified and updated on subsequent installs - DSD
2007-11-12 Added support for STIX fonts. A new rcParam,

  mathtext.fontset, can be used to choose between:

  ‘cm’:
    The TeX/LaTeX Computer Modern fonts
  ‘stix’:
    The STIX fonts (see stixfonts.org)
  ‘stixsans’:
    The STIX fonts, using sans-serif glyphs by default
  ‘custom’:
    A generic Unicode font, in which case the mathtext font must be specified using mathtext.bf, mathtext.it, mathtext.sf etc.

  Added a new example, stix_fonts_demo.py to show how to access different fonts and unusual symbols.

  - MGD
2007-11-12 Options to disable building backend extension modules moved
  from setup.py to setup.cfg - DSD
2007-11-09 Applied Martin Teichmann’s patch 1828813: a QPainter is used in
  paintEvent, which has to be destroyed using the method end(). If matplotlib raises an exception before the call to end - and it does if you feed it with bad data - this method end() is never called and Qt4 will start spitting error messages
2007-11-09 Moved pyparsing back into matplotlib namespace. Don’t use
  system pyparsing, API is too variable from one release to the next - DSD
2007-11-08 Made pylab use straight numpy instead of oldnumeric
  by default - EF
2007-11-08 Added additional record array utilites to mlab (rec2excel,
  rec2gtk, rec_join, rec_append_field, rec_drop_field) - JDH

2007-11-08 Updated pytz to version 2007g - DSD

2007-11-08 Updated pyparsing to version 1.4.8 - DSD

2007-11-08 Moved csv2rec to recutils and added other record array
  utilities - JDH

2007-11-08 If available, use existing pyparsing installation - DSD

2007-11-07 Removed old enthought.traits from lib/matplotlib, added
  Gael Varoquaux’s enthought.traits-2.6b1, which is stripped of setuptools. The package is installed to site-packages if not already available - DSD
2007-11-05 Added easy access to minor tick properties; slight mod
  of patch by Pierre G-M - EF
2007-11-02 Commited Phil Thompson’s patch 1599876, fixes to Qt4Agg
  backend and qt4 blitting demo - DSD
2007-11-02 Commited Phil Thompson’s patch 1599876, fixes to Qt4Agg
  backend and qt4 blitting demo - DSD
2007-10-31 Made log color scale easier to use with contourf;
  automatic level generation now works. - EF

2007-10-29 TRANSFORMS REFACTORING

> The primary goal of this refactoring was to make it easier to extend matplotlib to support new kinds of projections. This is primarily an internal improvement, and the possible user-visible changes it allows are yet to come.

> The transformation framework was completely rewritten in Python (with Numpy). This will make it easier to add news kinds of transformations without writing C/C++ code.

> Transforms are composed into a ‘transform tree’, made of transforms whose value depends on other transforms (their children). When the contents of children change, their parents are automatically updated to reflect those changes. To do this an “invalidation” method is used: when children change, all of their ancestors are marked as “invalid”. When the value of a transform is accessed at a later time, its value is recomputed only if it is invalid, otherwise a cached value may be used. This prevents unnecessary recomputations of transforms, and contributes to better interactive performance.

> The framework can be used for both affine and non-affine transformations. However, for speed, we want use the backend renderers to perform affine transformations whenever possible. Therefore, it is possible to perform just the affine or non-affine part of a transformation on a set of data. The affine is always assumed to occur after the non-affine. For any transform:

> > full transform == non-affine + affine

> Much of the drawing has been refactored in terms of compound paths. Therefore, many methods have been removed from the backend interface and replaced with a a handful to draw compound paths. This will make updating the backends easier, since there is less to update. It also should make the backends more consistent in terms of functionality.

> User visible changes:

> - POLAR PLOTS: Polar plots are now interactively zoomable, and the r-axis labels can be interactively rotated. Straight line segments are now interpolated to follow the curve of the r-axis.

> - Non-rectangular clipping works in more backends and with more types of objects.

> - Sharing an axis across figures is now done in exactly the same way as sharing an axis between two axes in the same figure:

>       fig1 = figure()
>       fig2 = figure()

>        ax1 = fig1.add_subplot(111)
>        ax2 = fig2.add_subplot(111, sharex=ax1, sharey=ax1)

> - linestyles now include steps-pre, steps-post and steps-mid. The old step still works and is equivalent to step-pre.

> - Multiple line styles may be provided to a collection.

> See API_CHANGES for more low-level information about this refactoring.

2007-10-24 Added ax kwarg to Figure.colorbar and pyplot.colorbar - EF

2007-10-19 Removed a gsave/grestore pair surrounding _draw_ps, which
  was causing a loss graphics state info (see “EPS output problem - scatter & edgecolors” on mpl-dev, 2007-10-29) - DSD
2007-10-15 Fixed a bug in patches.Ellipse that was broken for
  aspect=’auto’. Scale free ellipses now work properly for equal and auto on Agg and PS, and they fall back on a polygonal approximation for nonlinear transformations until we convince oursleves that the spline approximation holds for nonlinear transformations. Added unit/ellipse_compare.py to compare spline with vertex approx for both aspects. JDH
2007-10-05 remove generator expressions from texmanager and mpltraits.
  generator expressions are not supported by python-2.3 - DSD
2007-10-01 Made matplotlib.use() raise an exception if called after
  backends has been imported. - EF
2007-09-30 Modified update* methods of Bbox and Interval so they
  work with reversed axes. Prior to this, trying to set the ticks on a reversed axis failed with an uninformative error message. - EF

2007-09-30 Applied patches to axes3d to fix index error problem - EF

2007-09-24 Applied Eike Welk’s patch reported on mpl-dev on 2007-09-22
  Fixes a bug with multiple plot windows in the qt backend, ported the changes to backend_qt4 as well - DSD
2007-09-21 Changed cbook.reversed to yield the same result as the
  python reversed builtin - DSD
2007-09-13 The usetex support in the pdf backend is more usable now,
  so I am enabling it. - JKS

2007-09-12 Fixed a Axes.bar unit bug - JDH

2007-09-10 Made skiprows=1 the default on csv2rec - JDH

2007-09-09 Split out the plotting part of pylab and put it in
  pyplot.py; removed numerix from the remaining pylab.py, which imports everything from pyplot.py. The intention is that apart from cleanups, the result of importing from pylab is nearly unchanged, but there is the new alternative of importing from pyplot to get the state-engine graphics without all the numeric functions. Numpified examples; deleted two that were obsolete; modified some to use pyplot. - EF

2007-09-08 Eliminated gd and paint backends - EF

2007-09-06 .bmp file format is now longer an alias for .raw

2007-09-07 Added clip path support to pdf backend. - JKS

2007-09-06 Fixed a bug in the embedding of Type 1 fonts in PDF.
  Now it doesn’t crash Preview.app. - JKS
2007-09-06 Refactored image saving code so that all GUI backends can
  save most image types. See FILETYPES for a matrix of backends and their supported file types. Backend canvases should no longer write their own print_figure() method – instead they should write a print_xxx method for each filetype they can output and add an entry to their class-scoped filetypes dictionary. - MGD

2007-09-05 Fixed Qt version reporting in setupext.py - DSD

2007-09-04 Embedding Type 1 fonts in PDF, and thus usetex support
  via dviread, sort of works. To test, enable it by renaming _draw_tex to draw_tex. - JKS
2007-09-03 Added ability of errorbar show limits via caret or
  arrowhead ends on the bars; patch by Manual Metz. - EF
2007-09-03 Created type1font.py, added features to AFM and FT2Font
  (see API_CHANGES), started work on embedding Type 1 fonts in pdf files. - JKS

2007-09-02 Continued work on dviread.py. - JKS

2007-08-16 Added a set_extent method to AxesImage, allow data extent
  to be modified after initial call to imshow - DSD
2007-08-14 Fixed a bug in pyqt4 subplots-adjust. Thanks to
  Xavier Gnata for the report and suggested fix - DSD
2007-08-13 Use pickle to cache entire fontManager; change to using
  font_manager module-level function findfont wrapper for the fontManager.findfont method - EF

2007-08-11 Numpification and cleanup of mlab.py and some examples - EF

2007-08-06 Removed mathtext2

2007-07-31 Refactoring of distutils scripts.
  - Will not fail on the entire build if an optional Python package (e.g., Tkinter) is installed but its development headers are not (e.g., tk-devel). Instead, it will continue to build all other extensions.
  - Provide an overview at the top of the output to display what dependencies and their versions were found, and (by extension) what will be built.
  - Use pkg-config, when available, to find freetype2, since this was broken on Mac OS-X when using MacPorts in a non- standard location.
2007-07-30 Reorganized configuration code to work with traited config
  objects. The new config system is located in the matplotlib.config package, but it is disabled by default. To enable it, set NEWCONFIG=True in matplotlib.__init__.py. The new configuration system will still use the old matplotlibrc files by default. To switch to the experimental, traited configuration, set USE_TRAITED_CONFIG=True in config.__init__.py.
2007-07-29 Changed default pcolor shading to flat; added aliases
  to make collection kwargs agree with setter names, so updating works; related minor cleanups. Removed quiver_classic, scatter_classic, pcolor_classic. - EF

2007-07-26 Major rewrite of mathtext.py, using the TeX box layout model.

> There is one (known) backward incompatible change. The font commands (cal, rm, it, tt) now behave as TeX does: they are in effect until the next font change command or the end of the grouping. Therefore uses of $cal{R}$ should be changed to ${cal R}$. Alternatively, you may use the new LaTeX-style font commands (mathcal, mathrm, mathit, mathtt) which do affect the following group, e.g., $mathcal{R}$.

> Other new features include:

> - Math may be interspersed with non-math text. Any text with an even number of $’s (non-escaped) will be sent to the mathtext parser for layout.
> - Sub/superscripts are less likely to accidentally overlap.
> - Support for sub/superscripts in either order, e.g., $x^i_j$ and $x_j^i$ are equivalent.
> - Double sub/superscripts (e.g., $x_i_j$) are considered ambiguous and raise an exception. Use braces to disambiguate.
> - $frac{x}{y}$ can be used for displaying fractions.
> - $sqrt[3]{x}$ can be used to display the radical symbol with a root number and body.
> - $left(frac{x}{y}right)$ may be used to create parentheses and other delimiters that automatically resize to the height of their contents.
> - Spacing around operators etc. is now generally more like TeX.
> - Added support (and fonts) for boldface (bf) and sans-serif (sf) symbols.
> - Log-like function name shortcuts are supported. For example, $sin(x)$ may be used instead of ${rm sin}(x)$
> - Limited use of kerning for the easy case (same font)

> Behind the scenes, the pyparsing.py module used for doing the math parsing was updated to the latest stable version (1.4.6). A lot of duplicate code was refactored out of the Font classes.

> - MGD

2007-07-19 completed numpification of most trivial cases - NN

2007-07-19 converted non-numpy relicts throughout the code - NN

2007-07-19 replaced the Python code in numerix/ by a minimal wrapper around
  numpy that explicitly mentions all symbols that need to be addressed for further numpification - NN
2007-07-18 make usetex respect changes to rcParams. texmanager used to
  only configure itself when it was created, now it reconfigures when rcParams are changed. Thank you Alexander Schmolck for contributing a patch - DSD

2007-07-17 added validation to setting and changing rcParams - DSD

2007-07-17 bugfix segfault in transforms module. Thanks Ben North for
  the patch. - ADS
2007-07-16 clean up some code in ticker.ScalarFormatter, use unicode to
  render multiplication sign in offset ticklabel - DSD
2007-07-16 fixed a formatting bug in ticker.ScalarFormatter’s scientific
  notation (10^0 was being rendered as 10 in some cases) - DSD
2007-07-13 Add MPL_isfinite64() and MPL_isinf64() for testing
  doubles in (the now misnamed) MPL_isnan.h. - ADS

2007-07-13 The matplotlib._isnan module removed (use numpy.isnan) - ADS

2007-07-13 Some minor cleanups in _transforms.cpp - ADS

2007-07-13 Removed the rest of the numerix extension code detritus,
  numpified axes.py, and cleaned up the imports in axes.py - JDH
2007-07-13 Added legend.loc as configurable option that could in
  future default to ‘best’. - NN

2007-07-12 Bugfixes in mlab.py to coerce inputs into numpy arrays. -ADS

2007-07-11 Added linespacing kwarg to text.Text - EF

2007-07-11 Added code to store font paths in SVG files. - MGD

2007-07-10 Store subset of TTF font as a Type 3 font in PDF files. - MGD

2007-07-09 Store subset of TTF font as a Type 3 font in PS files. - MGD

2007-07-09 Applied Paul’s pick restructure pick and add pickers,
  sourceforge patch 1749829 - JDH

2007-07-09 Applied Allan’s draw_lines agg optimization. JDH

2007-07-08 Applied Carl Worth’s patch to fix cairo draw_arc - SC

2007-07-07 fixed bug 1712099: xpdf distiller on windows - DSD

2007-06-30 Applied patches to tkagg, gtk, and wx backends to reduce
  memory leakage. Patches supplied by Mike Droettboom; see tracker numbers 1745400, 1745406, 1745408. Also made unit/memleak_gui.py more flexible with command-line options. - EF
2007-06-30 Split defaultParams into separate file rcdefaults (together with
  validation code). Some heavy refactoring was necessary to do so, but the overall behavior should be the same as before. - NN
2007-06-27 Added MPLCONFIGDIR for the default location for mpl data
  and configuration. useful for some apache installs where HOME is not writable. Tried to clean up the logic in _get_config_dir to support non-writable HOME where are writable HOME/.matplotlib already exists - JDH
2007-06-27 Fixed locale bug reported at
  http://sourceforge.net/tracker/index.php?func=detail&aid=1744154&group_id=80706&atid=560720 by adding a cbook.unicode_safe function - JDH
2007-06-27 Applied Micheal’s tk savefig bugfix described at
  http://sourceforge.net/tracker/index.php?func=detail&aid=1716732&group_id=80706&atid=560720 Thanks Michael!
2007-06-27 Patch for get_py2exe_datafiles() to work with new directory
  layout. (Thanks Tocer and also Werner Bruhin.) -ADS
2007-06-27 Added a scroll event to the mpl event handling system and
  implemented it for backends GTK* – other backend users/developers/maintainers, please add support for your backend. - JDH
2007-06-25 Changed default to clip=False in colors.Normalize;
  modified ColorbarBase for easier colormap display - EF

2007-06-13 Added maskedarray option to rc, numerix - EF

2007-06-11 Python 2.5 compatibility fix for mlab.py - EF

2007-06-10 In matplotlibrc file, use ‘dashed’ | ‘solid’ instead
  of a pair of floats for contour.negative_linestyle - EF
2007-06-08 Allow plot and fill fmt string to be any mpl string
  colorspec - EF
2007-06-08 Added gnuplot file plotfile function to pylab – see
  examples/plotfile_demo.py - JDH
2007-06-07 Disable build of numarray and Numeric extensions for
  internal MPL use and the numerix layer. - ADS
2007-06-07 Added csv2rec to matplotlib.mlab to support automatically
  converting csv files to record arrays using type introspection, and turned on native datetime support using the new units support in matplotlib.dates. See examples/loadrec.py ! JDH

2007-06-07 Simplified internal code of _auto_legend_data - NN

2007-06-04 Added labeldistance arg to Axes.pie to control the raidal
  distance of the wedge labels - JDH
2007-06-03 Turned mathtext in SVG into single <text> with multiple <tspan>
  objects (easier to edit in inkscape). - NN

2007-06-02 Released 0.90.1 at revision 3352

2007-06-02 Display only meaningful labels when calling legend()
  without args. - NN
2007-06-02 Have errorbar follow the color cycle even if line is not plotted.
  Suppress plotting of errorbar caps for capsize=0. - NN

2007-06-02 Set markers to same alpha value as line. - NN

2007-06-02 Fix mathtext position in svg backend. - NN

2007-06-01 Deprecate Numeric and numarray for use as numerix. Props to
  Travis – job well done. - ADS
2007-05-18 Added LaTeX unicode support. Enable with the
  ‘text.latex.unicode’ rcParam. This requires the ucs and inputenc LaTeX packages. - ADS
2007-04-23 Fixed some problems with polar – added general polygon
  clipping to clip the lines a nd grids to the polar axes. Added support for set_rmax to easily change the maximum radial grid. Added support for polar legend - JDH
2007-04-16 Added Figure.autofmt_xdate to handle adjusting the bottom
  and rotating the tick labels for date plots when the ticks often overlap - JDH

2007-04-09 Beginnings of usetex support for pdf backend. -JKS

2007-04-07 Fixed legend/LineCollection bug. Added label support
  to collections. - EF
2007-04-06 Removed deprecated support for a float value as a gray-scale;
  now it must be a string, like ‘0.5’. Added alpha kwarg to ColorConverter.to_rgba_list. - EF
2007-04-06 Fixed rotation of ellipses in pdf backend
  (sf bug #1690559) -JKS
2007-04-04 More matshow tweaks; documentation updates; new method
  set_bounds() for formatters and locators. - EF
2007-04-02 Fixed problem with imshow and matshow of integer arrays;
  fixed problems with changes to color autoscaling. - EF
2007-04-01 Made image color autoscaling work correctly with
  a tracking colorbar; norm.autoscale now scales unconditionally, while norm.autoscale_None changes only None-valued vmin, vmax. - EF

2007-03-31 Added a qt-based subplot-adjustment dialog - DSD

2007-03-30 Fixed a bug in backend_qt4, reported on mpl-dev - DSD

2007-03-26 Removed colorbar_classic from figure.py; fixed bug in
  Figure.clf() in which _axobservers was not getting cleared. Modernization and cleanups. - EF
2007-03-26 Refactored some of the units support – units now live in
  the respective x and y Axis instances. See also API_CHANGES for some alterations to the conversion interface. JDH
2007-03-25 Fix masked array handling in quiver.py for numpy. (Numeric
  and numarray support for masked arrays is broken in other ways when using quiver. I didn’t pursue that.) - ADS

2007-03-23 Made font_manager.py close opened files. - JKS

2007-03-22 Made imshow default extent match matshow - EF

2007-03-22 Some more niceties for xcorr – a maxlags option, normed
  now works for xcorr as well as axorr, usevlines is supported, and a zero correlation hline is added. See examples/xcorr_demo.py. Thanks Sameer for the patch. - JDH
2007-03-21 Axes.vlines and Axes.hlines now create and returns a
  LineCollection, not a list of lines. This is much faster. The kwarg signature has changed, so consult the docs. Modified Axes.errorbar which uses vlines and hlines. See API_CHANGES; the return signature for these three functions is now different

2007-03-20 Refactored units support and added new examples - JDH

2007-03-19 Added Mike’s units patch - JDH

2007-03-18 Matshow as an Axes method; test version matshow1() in
  pylab; added ‘integer’ Boolean kwarg to MaxNLocator initializer to force ticks at integer locations. - EF

2007-03-17 Preliminary support for clipping to paths agg - JDH

2007-03-17 Text.set_text() accepts anything convertible with ‘%s’ - EF

2007-03-14 Add masked-array support to hist. - EF

2007-03-03 Change barh to take a kwargs dict and pass it to bar.
  Fixes sf bug #1669506.
2007-03-02 Add rc parameter pdf.inheritcolor, which disables all
  color-setting operations in the pdf backend. The idea is that you include the resulting file in another program and set the colors (both stroke and fill color) there, so you can use the same pdf file for e.g., a paper and a presentation and have them in the surrounding color. You will probably not want to draw figure and axis frames in that case, since they would be filled in the same color. - JKS

2007-02-26 Prevent building _wxagg.so with broken Mac OS X wxPython. - ADS

2007-02-23 Require setuptools for Python 2.3 - ADS

2007-02-22 WXAgg accelerator updates - KM

  WXAgg’s C++ accelerator has been fixed to use the correct wxBitmap constructor.

  The backend has been updated to use new wxPython functionality to provide fast blit() animation without the C++ accelerator. This requires wxPython 2.8 or later. Previous versions of wxPython can use the C++ acclerator or the old pure Python routines.

  setup.py no longer builds the C++ accelerator when wxPython >= 2.8 is present.

  The blit() method is now faster regardless of which agg/wxPython conversion routines are used.

2007-02-21 Applied the PDF backend patch by Nicolas Grilly.

  This impacts several files and directories in matplotlib:

  - Created the directory lib/matplotlib/mpl-data/fonts/pdfcorefonts, holding AFM files for the 14 PDF core fonts. These fonts are embedded in every PDF viewing application.
  - setup.py: Added the directory pdfcorefonts to package_data.
  - lib/matplotlib/__init__.py: Added the default parameter ‘pdf.use14corefonts’. When True, the PDF backend uses only the 14 PDF core fonts.
  - lib/matplotlib/afm.py: Added some keywords found in recent AFM files. Added a little workaround to handle Euro symbol.
  - lib/matplotlib/fontmanager.py: Added support for the 14 PDF core fonts. These fonts have a dedicated cache (file pdfcorefont.cache), not the same as for other AFM files (file .afmfont.cache). Also cleaned comments to conform to CODING_GUIDE.
  - lib/matplotlib/backends/backend_pdf.py: Added support for 14 PDF core fonts. Fixed some issues with incorrect character widths and encodings (works only for the most common encoding, WinAnsiEncoding, defined by the official PDF Reference). Removed parameter ‘dpi’ because it causes alignment issues.

  -JKS (patch by Nicolas Grilly)

2007-02-17 Changed ft2font.get_charmap, and updated all the files where
  get_charmap is mentioned - ES

2007-02-13 Added barcode demo- JDH

2007-02-13 Added binary colormap to cm - JDH

2007-02-13 Added twiny to pylab - JDH

2007-02-12 Moved data files into lib/matplotlib so that setuptools’
  develop mode works. Re-organized the mpl-data layout so that this source structure is maintained in the installation. (i.e., the ‘fonts’ and ‘images’ sub-directories are maintained in site-packages.) Suggest removing site-packages/matplotlib/mpl-data and ~/.matplotlib/ttffont.cache before installing - ADS
2007-02-07 Committed Rob Hetland’s patch for qt4: remove
  references to text()/latin1(), plus some improvements to the toolbar layout - DSD

2007-02-06 Released 0.90.0 at revision 3003

2007-01-22 Extended the new picker API to text, patches and patch
  collections. Added support for user customizable pick hit testing and attribute tagging of the PickEvent - Details and examples in examples/pick_event_demo.py - JDH
2007-01-16 Begun work on a new pick API using the mpl event handling
  frameowrk. Artists will define their own pick method with a configurable epsilon tolerance and return pick attrs. All artists that meet the tolerance threshold will fire a PickEvent with artist dependent attrs; e.g., a Line2D can set the indices attribute that shows the indices into the line that are within epsilon of the pick point. See examples/pick_event_demo.py. The implementation of pick for the remaining Artists remains to be done, but the core infrastructure at the level of event handling is in place with a proof-of-concept implementation for Line2D - JDH
2007-01-16 src/_image.cpp: update to use Py_ssize_t (for 64-bit systems).
  Use return value of fread() to prevent warning messages - SC.
2007-01-15 src/_image.cpp: combine buffer_argb32() and buffer_bgra32() into
  a new method color_conv(format) - SC
2007-01-14 backend_cairo.py: update draw_arc() so that
  examples/arctest.py looks correct - SC
2007-01-12 backend_cairo.py: enable clipping. Update draw_image() so that
  examples/contour_demo.py looks correct - SC
2007-01-12 backend_cairo.py: fix draw_image() so that examples/image_demo.py
  now looks correct - SC
2007-01-11 Added Axes.xcorr and Axes.acorr to plot the cross
  correlation of x vs y or the autocorrelation of x. pylab wrappers also provided. See examples/xcorr_demo.py - JDH
2007-01-10 Added “Subplot.label_outer” method. It will set the
  visibility of the ticklabels so that yticklabels are only visible in the first column and xticklabels are only visible in the last row - JDH

2007-01-02 Added additional kwarg documentation - JDH

2006-12-28 Improved error message for nonpositive input to log
  transform; added log kwarg to bar, barh, and hist, and modified bar method to behave sensibly by default when the ordinate has a log scale. (This only works if the log scale is set before or by the call to bar, hence the utility of the log kwarg.) - EF
2006-12-27 backend_cairo.py: update draw_image() and _draw_mathtext() to work
  with numpy - SC
2006-12-20 Fixed xpdf dependency check, which was failing on windows.
  Removed ps2eps dependency check. - DSD

2006-12-19 Added Tim Leslie’s spectral patch - JDH

2006-12-17 Added rc param ‘axes.formatter.limits’ to control
  the default threshold for switching to scientific notation. Added convenience method Axes.ticklabel_format() for turning scientific notation on or off on either or both axes. - EF
2006-12-16 Added ability to turn control scientific notation
  in ScalarFormatter - EF

2006-12-16 Enhanced boxplot to handle more flexible inputs - EF

2006-12-13 Replaced calls to where() in colors.py with much faster
  clip() and putmask() calls; removed inappropriate uses of getmaskorNone (which should be needed only very rarely); all in response to profiling by David Cournapeau. Also fixed bugs in my 2-D array support from 12-09. - EF
2006-12-09 Replaced spy and spy2 with the new spy that combines
  marker and image capabilities - EF
2006-12-09 Added support for plotting 2-D arrays with plot:
  columns are plotted as in Matlab - EF
2006-12-09 Added linewidth kwarg to bar and barh; fixed arg
  checking bugs - EF
2006-12-07 Made pcolormesh argument handling match pcolor;
  fixed kwarg handling problem noted by Pierre GM - EF
2006-12-06 Made pcolor support vector X and/or Y instead of
  requiring 2-D arrays - EF
2006-12-05 Made the default Artist._transform None (rather than
  invoking identity_transform for each artist only to have it overridden later). Use artist.get_transform() rather than artist._transform, even in derived classes, so that the default transform will be created lazily as needed - JDH
2006-12-03 Added LogNorm to colors.py as illustrated by
  examples/pcolor_log.py, based on suggestion by Jim McDonald. Colorbar modified to handle LogNorm. Norms have additional “inverse” method. - EF
2006-12-02 Changed class names in colors.py to match convention:
  normalize -> Normalize, no_norm -> NoNorm. Old names are still available. Changed __init__.py rc defaults to match those in matplotlibrc - EF

2006-11-22 Fixed bug in set_*lim that I had introduced on 11-15 - EF

2006-11-22 Added examples/clippedline.py, which shows how to clip line
  data based on view limits – it also changes the marker style when zoomed in - JDH
2006-11-21 Some spy bug-fixes and added precision arg per Robert C’s
  suggestion - JDH
2006-11-19 Added semi-automatic docstring generation detailing all the
  kwargs that functions take using the artist introspection tools; e.g., ‘help text now details the scatter kwargs that control the Text properties - JDH
2006-11-17 Removed obsolete scatter_classic, leaving a stub to
  raise NotImplementedError; same for pcolor_classic - EF

2006-11-15 Removed obsolete pcolor_classic - EF

2006-11-15 Fixed 1588908 reported by Russel Owen; factored
  nonsingular method out of ticker.py, put it into transforms.py as a function, and used it in set_xlim and set_ylim. - EF
2006-11-14 Applied patch 1591716 by Ulf Larssen to fix a bug in
  apply_aspect. Modified and applied patch 1594894 by mdehoon to fix bugs and improve formatting in lines.py. Applied patch 1573008 by Greg Willden to make psd etc. plot full frequency range for complex inputs. - EF
2006-11-14 Improved the ability of the colorbar to track
  changes in corresponding image, pcolor, or contourf. - EF
2006-11-11 Fixed bug that broke Numeric compatibility;
  added support for alpha to colorbar. The alpha information is taken from the mappable object, not specified as a kwarg. - EF
2006-11-05 Added broken_barh function for makring a sequence of
  horizontal bars broken by gaps – see examples/broken_barh.py
2006-11-05 Removed lineprops and markerprops from the Annotation code
  and replaced them with an arrow configurable with kwarg arrowprops. See examples/annotation_demo.py - JDH
2006-11-02 Fixed a pylab subplot bug that was causing axes to be
  deleted with hspace or wspace equals zero in subplots_adjust - JDH
2006-10-31 Applied axes3d patch 1587359
  http://sourceforge.net/tracker/index.php?func=detail&aid=1587359&group_id=80706&atid=560722 JDH

2006-10-26 Released 0.87.7 at revision 2835

2006-10-25 Made “tiny” kwarg in Locator.nonsingular much smaller - EF

2006-10-17 Closed sf bug 1562496 update line props dash/solid/cap/join
  styles - JDH
2006-10-17 Complete overhaul of the annotations API and example code -
  See matplotlib.text.Annotation and examples/annotation_demo.py JDH
2006-10-12 Committed Manuel Metz’s StarPolygon code and
  examples/scatter_star_poly.py - JDH
2006-10-11 commented out all default values in matplotlibrc.template
  Default values should generally be taken from defaultParam in __init__.py - the file matplotlib should only contain those values that the user wants to explicitly change from the default. (see thread “marker color handling” on matplotlib-devel)

2006-10-10 Changed default comment character for load to ‘#’ - JDH

2006-10-10 deactivated rcfile-configurability of markerfacecolor
  and markeredgecolor. Both are now hardcoded to the special value ‘auto’ to follow the line color. Configurability at run-time (using function arguments) remains functional. - NN
2006-10-07 introduced dummy argument magnification=1.0 to
  FigImage.make_image to satisfy unit test figimage_demo.py The argument is not yet handled correctly, which should only show up when using non-standard DPI settings in PS backend, introduced by patch #1562394. - NN

2006-10-06 add backend-agnostic example: simple3d.py - NN

2006-09-29 fix line-breaking for SVG-inline images (purely cosmetic) - NN

2006-09-29 reworked set_linestyle and set_marker
  markeredgecolor and markerfacecolor now default to a special value “auto” that keeps the color in sync with the line color further, the intelligence of axes.plot is cleaned up, improved and simplified. Complete compatibility cannot be guaranteed, but the new behavior should be much more predictable (see patch #1104615 for details) - NN
2006-09-29 changed implementation of clip-path in SVG to work around a
  limitation in inkscape - NN
2006-09-29 added two options to matplotlibrc:
  svg.image_inline svg.image_noscale see patch #1533010 for details - NN

2006-09-29 axes.py: cleaned up kwargs checking - NN

2006-09-29 setup.py: cleaned up setup logic - NN

2006-09-29 setup.py: check for required pygtk versions, fixes bug #1460783 - SC

2006-09-27 Released 0.87.6 at revision 2783

2006-09-24 Added line pointers to the Annotation code, and a pylab
  interface. See matplotlib.text.Annotation, examples/annotation_demo.py and examples/annotation_demo_pylab.py - JDH
2006-09-18 mathtext2.py: The SVG backend now supports the same things that
  the AGG backend does. Fixed some bugs with rendering, and out of bounds errors in the AGG backend - ES. Changed the return values of math_parse_s_ft2font_svg to support lines (fractions etc.)
2006-09-17 Added an Annotation class to facilitate annotating objects
  and an examples file examples/annotation_demo.py. I want to add dash support as in TextWithDash, but haven’t decided yet whether inheriting from TextWithDash is the right base class or if another approach is needed - JDH

2006-09-05 Released 0.87.5 at revision 2761

2006-09-04 Added nxutils for some numeric add-on extension code –
  specifically a better/more efficient inside polygon tester (see unit/inside_poly_*.py) - JDH

2006-09-04 Made bitstream fonts the rc default - JDH

2006-08-31 Fixed alpha-handling bug in ColorConverter, affecting
  collections in general and contour/contourf in particular. - EF
2006-08-30 ft2font.cpp: Added draw_rect_filled method (now used by mathtext2
  to draw the fraction bar) to FT2Font - ES
2006-08-29 setupext.py: wrap calls to tk.getvar() with str(). On some
  systems, getvar returns a Tcl_Obj instead of a string - DSD
2006-08-28 mathtext2.py: Sub/superscripts can now be complex (i.e.
  fractions etc.). The demo is also updated - ES
2006-08-28 font_manager.py: Added /usr/local/share/fonts to list of
  X11 font directories - DSD
2006-08-28 mahtext2.py: Initial support for complex fractions. Also,
  rendering is now completely separated from parsing. The sub/superscripts now work better. Updated the mathtext2_demo.py - ES
2006-08-27 qt backends: don’t create a QApplication when backend is
  imported, do it when the FigureCanvasQt is created. Simplifies applications where mpl is embedded in qt. Updated embedding_in_qt* examples - DSD
2006-08-27 mahtext2.py: Now the fonts are searched in the OS font dir and
  in the mpl-data dir. Also env is not a dict anymore. - ES
2006-08-26 minor changes to __init__.py, mathtex2_demo.py. Added matplotlibrc
  key “mathtext.mathtext2” (removed the key “mathtext2”) - ES
2006-08-21 mathtext2.py: Initial support for fractions
  Updated the mathtext2_demo.py _mathtext_data.py: removed “” from the unicode dicts mathtext.py: Minor modification (because of _mathtext_data.py)- ES
2006-08-20 Added mathtext2.py: Replacement for mathtext.py. Supports _ ^,
  rm, cal etc., sin, cos etc., unicode, recursive nestings, inline math mode. The only backend currently supported is Agg __init__.py: added new rc params for mathtext2 added mathtext2_demo.py example - ES

2006-08-19 Added embedding_in_qt4.py example - DSD

2006-08-11 Added scale free Ellipse patch for Agg - CM

2006-08-10 Added converters to and from julian dates to matplotlib.dates
  (num2julian and julian2num) - JDH
2006-08-08 Fixed widget locking so multiple widgets could share the
  event handling - JDH

2006-08-07 Added scale free Ellipse patch to SVG and PS - CM

2006-08-05 Re-organized imports in numerix for numpy 1.0b2 – TEO

2006-08-04 Added draw_markers to PDF backend. - JKS

2006-08-01 Fixed a bug in postscript’s rendering of dashed lines - DSD

2006-08-01 figure.py: savefig() update docstring to add support for ‘format’
  argument. backend_cairo.py: print_figure() add support ‘format’ argument. - SC

2006-07-31 Don’t let postscript’s xpdf distiller compress images - DSD

2006-07-31 Added shallowcopy() methods to all Transformations;
  removed copy_bbox_transform and copy_bbox_transform_shallow from transforms.py; added offset_copy() function to transforms.py to facilitate positioning artists with offsets. See examples/transoffset.py. - EF

2006-07-31 Don’t let postscript’s xpdf distiller compress images - DSD

2006-07-29 Fixed numerix polygon bug reported by Nick Fotopoulos.
  Added inverse_numerix_xy() transform method. Made autoscale_view() preserve axis direction (e.g., increasing down).- EF
2006-07-28 Added shallow bbox copy routine for transforms – mainly
  useful for copying transforms to apply offset to. - JDH
2006-07-28 Added resize method to FigureManager class
  for Qt and Gtk backend - CM

2006-07-28 Added subplots_adjust button to Qt backend - CM

2006-07-26 Use numerix more in collections.
  Quiver now handles masked arrays. - EF

2006-07-22 Fixed bug #1209354 - DSD

2006-07-22 make scatter() work with the kwarg “color”. Closes bug
  1285750 - DSD
2006-07-20 backend_cairo.py: require pycairo 1.2.0.
  print_figure() update to output SVG using cairo.

2006-07-19 Added blitting for Qt4Agg - CM

2006-07-19 Added lasso widget and example examples/lasso_demo.py - JDH

2006-07-18 Added blitting for QtAgg backend - CM

2006-07-17 Fixed bug #1523585: skip nans in semilog plots - DSD

2006-07-12 Add support to render the scientific notation label
  over the right-side y-axis - DSD

2006-07-11 Released 0.87.4 at revision 2558

2006-07-07 Fixed a usetex bug with older versions of latex - DSD

2006-07-07 Add compatibility for NumPy 1.0 - TEO

2006-06-29 Added a Qt4Agg backend. Thank you James Amundson - DSD

2006-06-26 Fixed a usetex bug. On windows, usetex will prcess
  postscript output in the current directory rather than in a temp directory. This is due to the use of spaces and tildes in windows paths, which cause problems with latex. The subprocess module is no longer used. - DSD
2006-06-22 Various changes to bar(), barh(), and hist().
  Added ‘edgecolor’ keyword arg to bar() and barh(). The x and y args in barh() have been renamed to width and bottom respectively, and their order has been swapped to maintain a (position, value) order ala matlab. left, height, width and bottom args can now all be scalars or sequences. barh() now defaults to edge alignment instead of center alignment. Added a keyword arg ‘align’ to bar(), barh() and hist() that controls between edge or center bar alignment. Fixed ignoring the rcParams[‘patch.facecolor’] for bar color in bar() and barh(). Fixed ignoring the rcParams[‘lines.color’] for error bar color in bar() and barh(). Fixed a bug where patches would be cleared when error bars were plotted if rcParams[‘axes.hold’] was False. - MAS
2006-06-22 Added support for numerix 2-D arrays as alternatives to
  a sequence of (x,y) tuples for specifying paths in collections, quiver, contour, pcolor, transforms. Fixed contour bug involving setting limits for color mapping. Added numpy-style all() to numerix. - EF
2006-06-20 Added custom FigureClass hook to pylab interface - see
  examples/custom_figure_class.py
2006-06-16 Added colormaps from gist (gist_earth, gist_stern,
  gist_rainbow, gist_gray, gist_yarg, gist_heat, gist_ncar) - JW
2006-06-16 Added a pointer to parent in figure canvas so you can
  access the container with fig.canvas.manager. Useful if you want to set the window title, e.g., in gtk fig.canvas.manager.window.set_title, though a GUI neutral method would be preferable JDH
2006-06-16 Fixed colorbar.py to handle indexed colors (i.e.,
  norm = no_norm()) by centering each colored region on its index. - EF
2006-06-15 Added scalex and scaley to Axes.autoscale_view to support
  selective autoscaling just the x or y axis, and supported these command in plot so you can say plot(something, scaley=False) and just the x axis will be autoscaled. Modified axvline and axhline to support this, so for example axvline will no longer autoscale the y axis. JDH

2006-06-13 Fix so numpy updates are backward compatible - TEO

2006-06-12 Updated numerix to handle numpy restructuring of
  oldnumeric - TEO
2006-06-12 Updated numerix.fft to handle numpy restructuring
  Added ImportError to numerix.linear_algebra for numpy -TEO
2006-06-11 Added quiverkey command to pylab and Axes, using
  QuiverKey class in quiver.py. Changed pylab and Axes to use quiver2 if possible, but drop back to the newly-renamed quiver_classic if necessary. Modified examples/quiver_demo.py to illustrate the new quiver and quiverkey. Changed LineCollection implementation slightly to improve compatibility with PolyCollection. - EF
2006-06-11 Fixed a usetex bug for windows, running latex on files
  with spaces in their names or paths was failing - DSD
2006-06-09 Made additions to numerix, changes to quiver to make it
  work with all numeric flavors. - EF
2006-06-09 Added quiver2 function to pylab and method to axes,
  with implementation via a Quiver class in quiver.py. quiver2 will replace quiver before the next release; it is placed alongside it initially to facilitate testing and transition. See also examples/quiver2_demo.py. - EF
2006-06-08 Minor bug fix to make ticker.py draw proper minus signs
  with usetex - DSD

2006-06-06 Released 0.87.3 at revision 2432

2006-05-30 More partial support for polygons with outline or fill,
  but not both. Made LineCollection inherit from ScalarMappable. - EF

2006-05-29 Yet another revision of aspect-ratio handling. - EF

2006-05-27 Committed a patch to prevent stroking zero-width lines in
  the svg backend - DSD
2006-05-24 Fixed colorbar positioning bug identified by Helge
  Avlesen, and improved the algorithm; added a ‘pad’ kwarg to control the spacing between colorbar and parent axes. - EF
2006-05-23 Changed color handling so that collection initializers
  can take any mpl color arg or sequence of args; deprecated float as grayscale, replaced by string representation of float. - EF

2006-05-19 Fixed bug: plot failed if all points were masked - EF

2006-05-19 Added custom symbol option to scatter - JDH

2006-05-18 New example, multi_image.py; colorbar fixed to show
  offset text when the ScalarFormatter is used; FixedFormatter augmented to accept and display offset text. - EF
2006-05-14 New colorbar; old one is renamed to colorbar_classic.
  New colorbar code is in colorbar.py, with wrappers in figure.py and pylab.py. Fixed aspect-handling bug reported by Michael Mossey. Made backend_bases.draw_quad_mesh() run.- EF
2006-05-08 Changed handling of end ranges in contourf: replaced
  “clip-ends” kwarg with “extend”. See docstring for details. -EF

2006-05-08 Added axisbelow to rc - JDH

2006-05-08 If using PyGTK require version 2.2+ - SC

2006-04-19 Added compression support to PDF backend, controlled by
  new pdf.compression rc setting. - JKS

2006-04-19 Added Jouni’s PDF backend

2006-04-18 Fixed a bug that caused agg to not render long lines

2006-04-16 Masked array support for pcolormesh; made pcolormesh support the
  same combinations of X,Y,C dimensions as pcolor does; improved (I hope) description of grid used in pcolor, pcolormesh. - EF

2006-04-14 Reorganized axes.py - EF

2006-04-13 Fixed a bug Ryan found using usetex with sans-serif fonts and
  exponential tick labels - DSD
2006-04-11 Refactored backend_ps and backend_agg to prevent module-level
  texmanager imports. Now these imports only occur if text.usetex rc setting is true - DSD
2006-04-10 Committed changes required for building mpl on win32
  platforms with visual studio. This allows wxpython blitting for fast animations. - CM

2006-04-10 Fixed an off-by-one bug in Axes.change_geometry.

2006-04-10 Fixed bug in pie charts where wedge wouldn’t have label in
  legend. Submitted by Simon Hildebrandt. - ADS
2006-05-06 Usetex makes temporary latex and dvi files in a temporary
  directory, rather than in the user’s current working directory - DSD
2006-04-05 Apllied Ken’s wx deprecation warning patch closing sf patch
  #1465371 - JDH
2006-04-05 Added support for the new API in the postscript backend.
  Allows values to be masked using nan’s, and faster file creation - DSD
2006-04-05 Use python’s subprocess module for usetex calls to
  external programs. subprocess catches when they exit abnormally so an error can be raised. - DSD
2006-04-03 Fixed the bug in which widgets would not respond to
  events. This regressed the twinx functionality, so I also updated subplots_adjust to update axes that share an x or y with a subplot instance. - CM
2006-04-02 Moved PBox class to transforms and deleted pbox.py;
  made pylab axis command a thin wrapper for Axes.axis; more tweaks to aspect-ratio handling; fixed Axes.specgram to account for the new imshow default of unit aspect ratio; made contour set the Axes.dataLim. - EF

2006-03-31 Fixed the Qt “Underlying C/C++ object deleted” bug. - JRE

2006-03-31 Applied Vasily Sulatskov’s Qt Navigation Toolbar enhancement. - JRE

2006-03-31 Ported Norbert’s rewriting of Halldor’s stineman_interp
  algorithm to make it numerix compatible and added code to matplotlib.mlab. See examples/interp_demo.py - JDH
2006-03-30 Fixed a bug in aspect ratio handling; blocked potential
  crashes when panning with button 3; added axis(‘image’) support. - EF
2006-03-28 More changes to aspect ratio handling; new PBox class
  in new file pbox.py to facilitate resizing and repositioning axes; made PolarAxes maintain unit aspect ratio. - EF
2006-03-23 Refactored TextWithDash class to inherit from, rather than
  delegate to, the Text class. Improves object inspection and closes bug # 1357969 - DSD
2006-03-22 Improved aspect ratio handling, including pylab interface.
  Interactive resizing, pan, zoom of images and plots (including panels with a shared axis) should work. Additions and possible refactoring are still likely. - EF

2006-03-21 Added another colorbrewer colormap (RdYlBu) - JSWHIT

2006-03-21 Fixed tickmarks for logscale plots over very large ranges.
  Closes bug # 1232920 - DSD

2006-03-21 Added Rob Knight’s arrow code; see examples/arrow_demo.py - JDH

2006-03-20 Added support for masking values with nan’s, using ADS’s
  isnan module and the new API. Works for *Agg backends - DSD

2006-03-20 Added contour.negative_linestyle rcParam - ADS

2006-03-20 Added _isnan extension module to test for nan with Numeric
  - ADS
2006-03-17 Added Paul and Alex’s support for faceting with quadmesh
  in sf patch 1411223 - JDH
2006-03-17 Added Charle Twardy’s pie patch to support colors=None.
  Closes sf patch 1387861 - JDH
2006-03-17 Applied sophana’s patch to support overlapping axes with
  toolbar navigation by toggling activation with the ‘a’ key. Closes sf patch 1432252 - JDH
2006-03-17 Applied Aarre’s linestyle patch for backend EMF; closes sf
  patch 1449279 - JDH
2006-03-17 Applied Jordan Dawe’s patch to support kwarg properties
  for grid lines in the grid command. Closes sf patch 1451661 - JDH

2006-03-17 Center postscript output on page when using usetex - DSD

2006-03-17 subprocess module built if Python <2.4 even if subprocess
  can be imported from an egg - ADS
2006-03-17 Added _subprocess.c from Python upstream and hopefully
  enabled building (without breaking) on Windows, although not tested. - ADS
2006-03-17 Updated subprocess.py to latest Python upstream and
  reverted name back to subprocess.py - ADS

2006-03-16 Added John Porter’s 3D handling code

2006-03-16 Released 0.87.2 at revision 2150

2006-03-15 Fixed bug in MaxNLocator revealed by daigos@infinito.it.
  The main change is that Locator.nonsingular now adjusts vmin and vmax if they are nearly the same, not just if they are equal. A new kwarg, “tiny”, sets the threshold. - EF
2006-03-14 Added import of compatibility library for newer numpy
  linear_algebra - TEO
2006-03-12 Extended “load” function to support individual columns and
  moved “load” and “save” into matplotlib.mlab so they can be used outside of pylab – see examples/load_converter.py - JDH
2006-03-12 Added AutoDateFormatter and AutoDateLocator submitted
  by James Evans. Try the load_converter.py example for a demo. - ADS

2006-03-11 Added subprocess module from python-2.4 - DSD

2006-03-11 Fixed landscape orientation support with the usetex
  option. The backend_ps print_figure method was getting complicated, I added a _print_figure_tex method to maintain some degree of sanity - DSD
2006-03-11 Added “papertype” savefig kwarg for setting
  postscript papersizes. papertype and ps.papersize rc setting can also be set to “auto” to autoscale pagesizes - DSD
2006-03-09 Apply P-J’s patch to make pstoeps work on windows
  patch report # 1445612 - DSD

2006-03-09 Make backend rc parameter case-insensitive - DSD

2006-03-07 Fixed bug in backend_ps related to C0-C6 papersizes,
  which were causing problems with postscript viewers. Supported page sizes include letter, legal, ledger, A0-A10, and B0-B10 - DSD

2006-03-07 Released 0.87.1

2006-03-04 backend_cairo.py:
  fix get_rgb() bug reported by Keith Briggs. Require pycairo 1.0.2. Support saving png to file-like objects. - SC

2006-03-03 Fixed pcolor handling of vmin, vmax - EF

2006-03-02 improve page sizing with usetex with the latex
  geometry package. Closes bug # 1441629 - DSD
2006-03-02 Fixed dpi problem with usetex png output. Accepted a
  modified version of patch # 1441809 - DSD

2006-03-01 Fixed axis(‘scaled’) to deal with case xmax < xmin - JSWHIT

2006-03-01 Added reversed colormaps (with ‘_r’ appended to name) - JSWHIT

2006-02-27 Improved eps bounding boxes with usetex - DSD

2006-02-27 Test svn commit, again!

2006-02-27 Fixed two dependency checking bugs related to usetex
  on Windows - DSD
2006-02-27 Made the rc deprecation warnings a little more human
  readable.
2006-02-26 Update the previous gtk.main_quit() bug fix to use gtk.main_level()
  - SC

2006-02-24 Implemented alpha support in contour and contourf - EF

2006-02-22 Fixed gtk main quit bug when quit was called before
  mainloop. - JDH
2006-02-22 Small change to colors.py to workaround apparent
  bug in numpy masked array module - JSWHIT
2006-02-22 Fixed bug in ScalarMappable.to_rgba() reported by
  Ray Jones, and fixed incorrect fix found by Jeff Whitaker - EF

2006-02-22 Released 0.87

2006-02-21 Fixed portrait/landscape orientation in postscript backend - DSD

2006-02-21 Fix bug introduced in yesterday’s bug fix - SC

2006-02-20 backend_gtk.py FigureCanvasGTK.draw(): fix bug reported by
  David Tremouilles - SC
2006-02-20 Remove the “pygtk.require(‘2.4’)” error from
  examples/embedding_in_gtk2.py - SC
2006-02-18 backend_gtk.py FigureCanvasGTK.draw(): simplify to use (rather than
  duplicate) the expose_event() drawing code - SC
2006-02-12 Added stagger or waterfall plot capability to LineCollection;
  illustrated in examples/collections.py. - EF
2006-02-11 Massive cleanup of the usetex code in the postscript backend. Possibly
  fixed the clipping issue users were reporting with older versions of ghostscript - DSD
2006-02-11 Added autolim kwarg to axes.add_collection. Changed
  collection get_verts() methods accordingly. - EF
2006-02-09 added a temporary rc parameter text.dvipnghack, to allow Mac users to get nice
  results with the usetex option. - DSD

2006-02-09 Fixed a bug related to setting font sizes with the usetex option. - DSD

2006-02-09 Fixed a bug related to usetex’s latex code. - DSD

2006-02-09 Modified behavior of font.size rc setting. You should define font.size in pts,
  which will set the “medium” or default fontsize. Special text sizes like axis labels or tick labels can be given relative font sizes like small, large, x-large, etc. and will scale accordingly. - DSD
2006-02-08 Added py2exe specific datapath check again. Also added new
  py2exe helper function get_py2exe_datafiles for use in py2exe setup.py scripts. - CM

2006-02-02 Added box function to pylab

2006-02-02 Fixed a problem in setupext.py, tk library formatted in unicode
  caused build problems - DSD

2006-02-01 Dropped TeX engine support in usetex to focus on LaTeX. - DSD

2006-01-29 Improved usetex option to respect the serif, sans-serif, monospace,
  and cursive rc settings. Removed the font.latex.package rc setting, it is no longer required - DSD

2006-01-29 Fixed tex’s caching to include font.family rc information - DSD

2006-01-29 Fixed subpixel rendering bug in *Agg that was causing
  uneven gridlines - JDH
2006-01-28 Added fontcmd to backend_ps’s RendererPS.draw_tex, to support other
  font families in eps output - DSD
2006-01-28 Added MaxNLocator to ticker.py, and changed contour.py to
  use it by default. - EF
2006-01-28 Added fontcmd to backend_ps’s RendererPS.draw_tex, to support other
  font families in eps output - DSD
2006-01-27 Buffered reading of matplotlibrc parameters in order to allow
  ‘verbose’ settings to be processed first (allows verbose.report during rc validation process) - DSD
2006-01-27 Removed setuptools support from setup.py and created a
  separate setupegg.py file to replace it. - CM
2006-01-26 Replaced the ugly datapath logic with a cleaner approach from
  http://wiki.python.org/moin/DistutilsInstallDataScattered. Overrides the install_data command. - CM
2006-01-24 Don’t use character typecodes in cntr.c — changed to use
  defined typenumbers instead. - TEO

2006-01-24 Fixed some bugs in usetex’s and ps.usedistiller’s dependency

2006-01-24 Added masked array support to scatter - EF

2006-01-24 Fixed some bugs in usetex’s and ps.usedistiller’s dependency
  checking - DSD

2006-01-24 Released 0.86.2

2006-01-20 Added a converters dict to pylab load to convert selected
  coloumns to float – especially useful for files with date strings, uses a datestr2num converter - JDH
2006-01-20 Added datestr2num to matplotlib dates to convert a string
  or sequence of strings to a matplotlib datenum
2006-01-18 Added quadrilateral pcolormesh patch 1409190 by Alex Mont
  and Paul Kienzle – this is *Agg only for now. See examples/quadmesh_demo.py - JDH

2006-01-18 Added Jouni’s boxplot patch - JDH

2006-01-18 Added comma delimiter for pylab save - JDH

2006-01-12 Added Ryan’s legend patch - JDH

2006-1-12 Fixed numpy / numeric to use .dtype.char to keep in SYNC with numpy SVN

2006-1-11 Released 0.86.1

2006-1-11 Fixed setup.py for win32 build and added rc template to the MANIFEST.in

2006-1-10 Added xpdf distiller option. matplotlibrc ps.usedistiller can now be
  none, false, ghostscript, or xpdf. Validation checks for dependencies. This needs testing, but the xpdf option should produce the highest-quality output and small file sizes - DSD
2006-01-10 For the usetex option, backend_ps now does all the LaTeX work in the
  os’s temp directory - DSD

2006-1-10 Added checks for usetex dependencies. - DSD

2006-1-9 Released 0.86

2006-1-4 Changed to support numpy (new name for scipy_core) - TEO

2006-1-4 Added Mark’s scaled axes patch for shared axis

2005-12-28 Added Chris Barker’s build_wxagg patch - JDH

2005-12-27 Altered numerix/scipy to support new scipy package
  structure - TEO

2005-12-20 Fixed Jame’s Boyles date tick reversal problem - JDH

2005-12-20 Added Jouni’s rc patch to support lists of keys to set on -
  JDH
2005-12-12 Updated pyparsing and mathtext for some speed enhancements
  (Thanks Paul McGuire) and minor fixes to scipy numerix and setuptools
2005-12-12 Matplotlib data is now installed as package_data in
  the matplotlib module. This gets rid of checking the many possibilities in matplotlib._get_data_path() - CM
2005-12-11 Support for setuptools/pkg_resources to build and use
  matplotlib as an egg. Still allows matplotlib to exist using a traditional distutils install. - ADS
2005-12-03 Modified setup to build matplotlibrc based on compile time
  findings. It will set numerix in the order of scipy, numarray, Numeric depending on which are founds, and backend as in preference order GTKAgg, WXAgg, TkAgg, GTK, Agg, PS
2005-12-03 Modified scipy patch to support Numeric, scipy and numarray
  Some work remains to be done because some of the scipy imports are broken if only the core is installed. e.g., apparently we need from scipy.basic.fftpack import * rather than from scipy.fftpack import *
2005-12-03 Applied some fixes to Nicholas Young’s nonuniform image
  patch

2005-12-01 Applied Alex Gontmakher hatch patch - PS only for now

2005-11-30 Added Rob McMullen’s EMF patch

2005-11-30 Added Daishi’s patch for scipy

2005-11-30 Fixed out of bounds draw markers segfault in agg

2005-11-28 Got TkAgg blitting working 100% (cross fingers) correctly. - CM

2005-11-27 Multiple changes in cm.py, colors.py, figure.py, image.py,
  contour.py, contour_demo.py; new _cm.py, examples/image_masked.py. 1) Separated the color table data from cm.py out into a new file, _cm.py, to make it easier to find the actual code in cm.py and to add new colormaps. Also added some line breaks to the color data dictionaries. Everything from _cm.py is imported by cm.py, so the split should be transparent. 2) Enabled automatic generation of a colormap from a list of colors in contour; see modified examples/contour_demo.py. 3) Support for imshow of a masked array, with the ability to specify colors (or no color at all) for masked regions, and for regions that are above or below the normally mapped region. See examples/image_masked.py. 4) In support of the above, added two new classes, ListedColormap, and no_norm, to colors.py, and modified the Colormap class to include common functionality. Added a clip kwarg to the normalize class. Reworked color handling in contour.py, especially in the ContourLabeller mixin. - EF

2005-11-25 Changed text.py to ensure color is hashable. EF

2005-11-16 Released 0.85

2005-11-16 Changed the default default linewidth in rc to 1.0

2005-11-16 Replaced agg_to_gtk_drawable with pure pygtk pixbuf code in
  backend_gtkagg. When the equivalent is doe for blit, the agg extension code will no longer be needed
2005-11-16 Added a maxdict item to cbook to prevent caches from
  growing w/o bounds
2005-11-15 Fixed a colorup/colordown reversal bug in finance.py –
  Thanks Gilles
2005-11-15 Applied Jouni K Steppanen’s boxplot patch SF patch#1349997
  - JDH
2005-11-09 added axisbelow attr for Axes to determine whether ticks and such
  are above or below the actors

2005-11-08 Added Nicolas’ irregularly spaced image patch

2005-11-08 Deprecated HorizontalSpanSelector and replaced with
  SpanSelection that takes a third arg, direction. The new SpanSelector supports horizontal and vertical span selection, and the appropriate min/max is returned. - CM

2005-11-08 Added lineprops dialog for gtk

2005-11-03 Added FIFOBuffer class to mlab to support real time feeds
  and examples/fifo_buffer.py
2005-11-01 Contributed Nickolas Young’s patch for afm mathtext to
  support mathtext based upon the standard postscript Symbol font when ps.usetex = True.

2005-10-26 Added support for scatter legends - thanks John Gill

2005-10-20 Fixed image clipping bug that made some tex labels
  disappear. JDH

2005-10-14 Removed sqrt from dvipng 1.6 alpha channel mask.

2005-10-14 Added width kwarg to hist function

2005-10-10 Replaced all instances of os.rename with shutil.move

2005-10-05 Added Michael Brady’s ydate patch

2005-10-04 Added rkern’s texmanager patch

2005-09-25 contour.py modified to use a single ContourSet class
  that handles filled contours, line contours, and labels; added keyword arg (clip_ends) to contourf. Colorbar modified to work with new ContourSet object; if the ContourSet has lines rather than polygons, the colorbar will follow suit. Fixed a bug introduced in 0.84, in which contourf(…,colors=…) was broken - EF

2005-09-19 Released 0.84

2005-09-14 Added a new ‘resize_event’ which triggers a callback with a
  backend_bases.ResizeEvent object - JDH

2005-09-14 font_manager.py: removed chkfontpath from x11FontDirectory() - SC

2005-09-14 Factored out auto date locator/formatter factory code into
  matplotlib.date.date_ticker_factory; applies John Bryne’s quiver patch.

2005-09-13 Added Mark’s axes positions history patch #1286915

2005-09-09 Added support for auto canvas resizing with
  fig.set_figsize_inches(9,5,forward=True) # inches OR fig.resize(400,300) # pixels
2005-09-07 figure.py: update Figure.draw() to use the updated
  renderer.draw_image() so that examples/figimage_demo.py works again. examples/stock_demo.py: remove data_clipping (which no longer exists) - SC

2005-09-06 Added Eric’s tick.direction patch: in or out in rc

2005-09-06 Added Martin’s rectangle selector widget

2005-09-04 Fixed a logic err in text.py that was preventing rgxsuper
  from matching - JDH

2005-08-29 Committed Ken’s wx blit patch #1275002

2005-08-26 colorbar modifications - now uses contourf instead of imshow
  so that colors used by contourf are displayed correctly. Added two new keyword args (cspacing and clabels) that are only relevant for ContourMappable images - JSWHIT

2005-08-24 Fixed a PS image bug reported by Darren - JDH

2005-08-23 colors.py: change hex2color() to accept unicode strings as well as
  normal strings. Use isinstance() instead of types.IntType etc - SC

2005-08-16 removed data_clipping line and rc property - JDH

2005-08-22 backend_svg.py: Remove redundant “x=0.0 y=0.0” from svg element.
  Increase svg version from 1.0 to 1.1. Add viewBox attribute to svg element to allow SVG documents to scale-to-fit into an arbitrary viewport - SC

2005-08-16 Added Eric’s dot marker patch - JDH

2005-08-08 Added blitting/animation for TkAgg - CM

2005-08-05 Fixed duplicate tickline bug - JDH

2005-08-05 Fixed a GTK animation bug that cropped up when doing
  animations in gtk//gtkagg canvases that had widgets packed above them

2005-08-05 Added Clovis Goldemberg patch to the tk save dialog

2005-08-04 Removed origin kwarg from backend.draw_image. origin is
  handled entirely by the frontend now.

2005-07-03 Fixed a bug related to TeX commands in backend_ps

2005-08-03 Fixed SVG images to respect upper and lower origins.

2005-08-03 Added flipud method to image and removed it from to_str.

2005-07-29 Modified figure.figaspect to take an array or number;
  modified backend_svg to write utf-8 - JDH
2005-07-30 backend_svg.py: embed png image files in svg rather than linking
  to a separate png file, fixes bug #1245306 (thanks to Norbert Nemec for the patch) - SC

2005-07-29 Released 0.83.2

2005-07-27 Applied SF patch 1242648: minor rounding error in
  IndexDateFormatter in dates.py
2005-07-27 Applied sf patch 1244732: Scale axis such that circle
  looks like circle - JDH

2005-07-29 Improved message reporting in texmanager and backend_ps - DSD

2005-07-28 backend_gtk.py: update FigureCanvasGTK.draw() (needed due to the
  recent expose_event() change) so that examples/anim.py works in the usual way - SC
2005-07-26 Added new widgets Cursor and HorizontalSpanSelector to
  matplotlib.widgets. See examples/widgets/cursor.py and examples/widgets/span_selector.py - JDH
2005-07-26 added draw event to mpl event hierarchy – triggered on
  figure.draw

2005-07-26 backend_gtk.py: allow ‘f’ key to toggle window fullscreen mode

2005-07-26 backend_svg.py: write “<…/>” elements all on one line and remove
  surplus spaces - SC
2005-07-25 backend_svg.py: simplify code by deleting GraphicsContextSVG and
  RendererSVG.new_gc(), and moving the gc.get_capstyle() code into RendererSVG._get_gc_props_svg() - SC
2005-07-24 backend_gtk.py: call FigureCanvasBase.motion_notify_event() on
  all motion-notify-events, not just ones where a modifier key or button has been pressed (fixes bug report from Niklas Volbers) - SC
2005-07-24 backend_gtk.py: modify print_figure() use own pixmap, fixing
  problems where print_figure() overwrites the display pixmap. return False from all button/key etc events - to allow the event to propagate further - SC
2005-07-23 backend_gtk.py: change expose_event from using set_back_pixmap();
  clear() to draw_drawable() - SC
2005-07-23 backend_gtk.py: removed pygtk.require()
  matplotlib/__init__.py: delete ‘FROZEN’ and ‘McPLError’ which are no longer used - SC

2005-07-22 backend_gdk.py: removed pygtk.require() - SC

2005-07-21 backend_svg.py: Remove unused imports. Remove methods doc strings
  which just duplicate the docs from backend_bases.py. Rename draw_mathtext to _draw_mathtext. - SC
2005-07-17 examples/embedding_in_gtk3.py: new example demonstrating placing
  a FigureCanvas in a gtk.ScrolledWindow - SC

2005-07-14 Fixed a Windows related bug (#1238412) in texmanager - DSD

2005-07-11 Fixed color kwarg bug, setting color=1 or 0 caused an
  exception - DSD

2005-07-07 Added Eric’s MA set_xdata Line2D fix - JDH

2005-07-06 Made HOME/.matplotlib the new config dir where the
  matplotlibrc file, the ttf.cache, and the tex.cache live. The new default filenames in .matplotlib have no leading dot and are not hidden. e.g., the new names are matplotlibrc tex.cache ttffont.cache. This is how ipython does it so it must be right. If old files are found, a warning is issued and they are moved to the new location. Also fixed texmanager to put all files, including temp files in ~/.matplotlib/tex.cache, which allows you to usetex in non-writable dirs.
2005-07-05 Fixed bug #1231611 in subplots adjust layout. The problem
  was that the text cacheing mechanism was not using the transformation affine in the key. - JDH
2005-07-05 Fixed default backend import problem when using API (SF bug
  # 1209354 - see API_CHANGES for more info - JDH

2005-07-04 backend_gtk.py: require PyGTK version 2.0.0 or higher - SC

2005-06-30 setupext.py: added numarray_inc_dirs for building against
  numarray when not installed in standard location - ADS
2005-06-27 backend_svg.py: write figure width, height as int, not float.
  Update to fix some of the pychecker warnings - SC
2005-06-23 Updated examples/agg_test.py to demonstrate curved paths
  and fills - JDH
2005-06-21 Moved some texmanager and backend_agg tex caching to class
  level rather than instance level - JDH
2005-06-20 setupext.py: fix problem where _nc_backend_gdk is installed to the
  wrong directory - SC

2005-06-19 Added 10.4 support for CocoaAgg. - CM

2005-06-18 Move Figure.get_width_height() to FigureCanvasBase and return
  int instead of float. - SC
2005-06-18 Applied Ted Drain’s QtAgg patch: 1) Changed the toolbar to
  be a horizontal bar of push buttons instead of a QToolbar and updated the layout algorithms in the main window accordingly. This eliminates the ability to drag and drop the toolbar and detach it from the window. 2) Updated the resize algorithm in the main window to show the correct size for the plot widget as requested. This works almost correctly right now. It looks to me like the final size of the widget is off by the border of the main window but I haven’t figured out a way to get that information yet. We could just add a small margin to the new size but that seems a little hacky. 3) Changed the x/y location label to be in the toolbar like the Tk backend instead of as a status line at the bottom of the widget. 4) Changed the toolbar pixmaps to use the ppm files instead of the png files. I noticed that the Tk backend buttons looked much nicer and it uses the ppm files so I switched them.
2005-06-17 Modified the gtk backend to not queue mouse motion events.
  This allows for live updates when dragging a slider. - CM
2005-06-17 Added starter CocoaAgg backend. Only works on OS 10.3 for
  now and requires PyObjC. (10.4 is high priority) - CM
2005-06-17 Upgraded pyparsing and applied Paul McGuire’s suggestions
  for speeding things up. This more than doubles the speed of mathtext in my simple tests. JDH

2005-06-16 Applied David Cooke’s subplot make_key patch

2005-06-15 0.82 released

2005-06-15 Added subplot config tool to GTK* backends – note you must
  now import the NavigationToolbar2 from your backend of choice rather than from backend_gtk because it needs to know about the backend specific canvas – see examples/embedding_in_gtk2.py. Ditto for wx backend – see examples/embedding_in_wxagg.py

2005-06-15 backend_cairo.py: updated to use pycairo 0.5.0 - SC

2005-06-14 Wrote some GUI neutral widgets (Button, Slider,
  RadioButtons, CheckButtons) in matplotlib.widgets. See examples/widgets/*.py - JDH
2005-06-14 Exposed subplot parameters as rc vars and as the fig
  SubplotParams instance subplotpars. See figure.SubplotParams, figure.Figure.subplots_adjust and the pylab method subplots_adjust and examples/subplots_adjust.py . Also added a GUI neutral widget for adjusting subplots, see examples/subplot_toolbar.py - JDH
2005-06-13 Exposed cap and join style for lines with new rc params and

  > line properties

  lines.dash_joinstyle : miter # miter|round|bevel lines.dash_capstyle : butt # butt|round|projecting lines.solid_joinstyle : miter # miter|round|bevel lines.solid_capstyle : projecting # butt|round|projecting

2005-06-13 Added kwargs to Axes init

2005-06-13 Applied Baptiste’s tick patch - JDH

2005-06-13 Fixed rc alias ‘l’ bug reported by Fernando by removing
  aliases for mainlevel rc options. - JDH

2005-06-10 Fixed bug #1217637 in ticker.py - DSD

2005-06-07 Fixed a bug in texmanager.py: .aux files not being removed - DSD

2005-06-08 Added Sean Richard’s hist binning fix – see API_CHANGES - JDH

2005-06-07 Fixed a bug in texmanager.py: .aux files not being removed
  - DSD

2005-06-07 matplotlib-0.81 released

2005-06-06 Added autoscale_on prop to axes

2005-06-06 Added Nick’s picker “among” patch - JDH

2005-06-05 Fixed a TeX/LaTeX font discrepency in backend_ps. - DSD

2005-06-05 Added a ps.distill option in rc settings. If True, postscript
  output will be distilled using ghostscript, which should trim the file size and allow it to load more quickly. Hopefully this will address the issue of large ps files due to font definitions. Tested with gnu-ghostscript-8.16. - DSD

2005-06-03 Improved support for tex handling of text in backend_ps. - DSD

2005-06-03 Added rc options to render text with tex or latex, and to select
  the latex font package. - DSD

2005-06-03 Fixed a bug in ticker.py causing a ZeroDivisionError

2005-06-02 backend_gtk.py remove DBL_BUFFER, add line to expose_event to
  try to fix pygtk 2.6 redraw problem - SC
2005-06-01 The default behavior of ScalarFormatter now renders scientific
  notation and large numerical offsets in a label at the end of the axis. - DSD

2005-06-01 Added Nicholas’ frombyte image patch - JDH

2005-05-31 Added vertical TeX support for agg - JDH

2005-05-31 Applied Eric’s cntr patch - JDH

2005-05-27 Finally found the pesky agg bug (which Maxim was kind
  enough to fix within hours) that was causing a segfault in the win32 cached marker drawing. Now windows users can get the enormouse performance benefits of caced markers w/o those occasional pesy screenshots. - JDH
2005-05-27 Got win32 build system working again, using a more recent
  version of gtk and pygtk in the win32 build, gtk 2.6 from http://www.gimp.org/~tml/gimp/win32/downloads.html (you will also need libpng12.dll to use these). I haven’t tested whether this binary build of mpl for win32 will work with older gtk runtimes, so you may need to upgrade.
2005-05-27 Fixed bug where 2nd wxapp could be started if using wxagg
  backend. - ADS

2005-05-26 Added Daishi text with dash patch – see examples/dashtick.py

2005-05-26 Moved backend_latex functionality into backend_ps. If
  text.usetex=True, the PostScript backend will use LaTeX to generate the .ps or .eps file. Ghostscript is required for eps output. - DSD

2005-05-24 Fixed alignment and color issues in latex backend. - DSD

2005-05-21 Fixed raster problem for small rasters with dvipng – looks
  like it was a premultipled alpha problem - JDH
2005-05-20 Added linewidth and faceted kwarg to scatter to control
  edgewidth and color. Also added autolegend patch to inspect line segments.

2005-05-18 Added Orsay and JPL qt fixes - JDH

2005-05-17 Added a psfrag latex backend – some alignment issues need
  to be worked out. Run with -dLaTeX and a .tex file and *.eps file are generated. latex and dvips the generated latex file to get ps output. Note xdvi *does not work, you must generate ps.- JDH
2005-05-13 Added Florent Rougon’s Axis set_label1
  patch

2005-05-17 pcolor optimization, fixed bug in previous pcolor patch - JSWHIT

2005-05-16 Added support for masked arrays in pcolor - JSWHIT

2005-05-12 Started work on TeX text for antigrain using pngdvi – see
  examples/tex_demo.py and the new module matplotlib.texmanager. Rotated text not supported and rendering small glyps is not working right yet. BUt large fontsizes and/or high dpi saved figs work great.
2005-05-10 New image resize options interpolation options. New values

  for the interp kwarg are

  ‘nearest’, ‘bilinear’, ‘bicubic’, ‘spline16’, ‘spline36’, ‘hanning’, ‘hamming’, ‘hermite’, ‘kaiser’, ‘quadric’, ‘catrom’, ‘gaussian’, ‘bessel’, ‘mitchell’, ‘sinc’, ‘lanczos’, ‘blackman’

  See help(imshow) for details, particularly the interpolation, filternorm and filterrad kwargs

2005-05-10 Applied Eric’s contour mem leak fixes - JDH

2005-05-10 Extended python agg wrapper and started implementing
  backend_agg2, an agg renderer based on the python wrapper. This will be more flexible and easier to extend than the current backend_agg. See also examples/agg_test.py - JDH
2005-05-09 Added Marcin’s no legend patch to exclude lines from the

  autolegend builder

  plot(x, y, label=’nolegend’)

2005-05-05 Upgraded to agg23

2005-05-05 Added newscalarformatter_demo.py to examples. -DSD

2005-05-04 Added NewScalarFormatter. Improved formatting of ticklabels,
  scientific notation, and the ability to plot large large numbers with small ranges, by determining a numerical offset. See ticker.NewScalarFormatter for more details. -DSD

2005-05-03 Added the option to specify a delimiter in pylab.load -DSD

2005-04-28 Added Darren’s line collection example

2005-04-28 Fixed aa property in agg - JDH

2005-04-27 Set postscript page size in .matplotlibrc - DSD

2005-04-26 Added embedding in qt example. - JDH

2005-04-14 Applied Michael Brady’s qt backend patch: 1) fix a bug
  where keyboard input was grabbed by the figure and not released 2) turn on cursor changes 3) clean up a typo and commented-out print statement. - JDH
2005-04-14 Applied Eric Firing’s masked data lines patch and contour
  patch. Support for masked arrays has been added to the plot command and to the Line2D object. Only the valid points are plotted. A “valid_only” kwarg was added to the get_xdata() and get_ydata() methods of Line2D; by default it is False, so that the original data arrays are returned. Setting it to True returns the plottable points. - see examples/masked_demo.py - JDH

2005-04-13 Applied Tim Leslie’s arrow key event handling patch - JDH

0.80 released

2005-04-11 Applied a variant of rick’s xlim/ylim/axis patch. These
  functions now take kwargs to let you selectively alter only the min or max if desired. e.g., xlim(xmin=2) or axis(ymax=3). They always return the new lim. - JDH
2005-04-11 Incorporated Werner’s wx patch – wx backend should be
  compatible with wxpython2.4 and recent versions of 2.5. Some early versions of wxpython 2.5 will not work because there was a temporary change in the dc API that was rolled back to make it 2.4 compliant
2005-04-11 modified tkagg show so that new figure window pops up on
  call to figure

2005-04-11 fixed wxapp init bug

2005-04-02 updated backend_ps.draw_lines, draw_markers for use with the
  new API - DSD

2005-04-01 Added editable polygon example

2005-03-31 0.74 released

2005-03-30 Fixed and added checks for floating point inaccuracy in
  ticker.Base - DSD
2005-03-30 updated /ellipse definition in backend_ps.py to address bug
  #1122041 - DSD

2005-03-29 Added unicode support for Agg and PS - JDH

2005-03-28 Added Jarrod’s svg patch for text - JDH

2005-03-28 Added Ludal’s arrow and quiver patch - JDH

2005-03-28 Added label kwarg to Axes to facilitate forcing the
  creation of new Axes with otherwise identical attributes

2005-03-28 Applied boxplot and OSX font search patches

2005-03-27 Added ft2font NULL check to fix Japanase font bug - JDH

2005-03-27 Added sprint legend patch plus John Gill’s tests and fix –
  see examples/legend_auto.py - JDH

2005-03-19 0.73.1 released

2005-03-19 Reverted wxapp handling because it crashed win32 - JDH

2005-03-18 Add .number attribute to figure objects returned by figure() - FP

2005-03-18 0.73 released

2005-03-16 Fixed labelsep bug

2005-03-16 Applied Darren’s ticker fix for small ranges - JDH

2005-03-16 Fixed tick on horiz colorbar - JDH

2005-03-16 Added Japanses winreg patch - JDH

2005-03-15 backend_gtkagg.py: changed to use double buffering, this fixes
  the problem reported Joachim Berdal Haga - “Parts of plot lagging from previous frame in animation”. Tested with anim.py and it makes no noticable difference to performance (23.7 before, 23.6 after) - SC
2005-03-14 add src/_backend_gdk.c extension to provide a substitute function
  for pixbuf.get_pixels_array(). Currently pixbuf.get_pixels_array() only works with Numeric, and then only works if pygtk has been compiled with Numeric support. The change provides a function pixbuf_get_pixels_array() which works with Numeric and numarray and is always available. It means that backend_gtk should be able to display images and mathtext in all circumstances. - SC

2005-03-11 Upgraded CXX to 5.3.1

2005-03-10 remove GraphicsContextPS.set_linestyle()
  and GraphicsContextSVG.set_linestyle() since they do no more than the base class GraphicsContext.set_linestyle() - SC

2005-03-09 Refactored contour functionality into dedicated module

2005-03-09 Added Eric’s contourf updates and Nadia’s clabel functionality

2005-03-09 Moved colorbar to figure.Figure to expose it for API developers
  - JDH

2005-03-09 backend_cairo.py: implemented draw_markers() - SC

2005-03-09 cbook.py: only use enumerate() (the python version) if the builtin
  version is not available.
    Add new function ‘izip’ which is set to itertools.izip if available and the python equivalent if not available. - SC
2005-03-07 backend_gdk.py: remove PIXELS_PER_INCH from points_to_pixels(), but
  still use it to adjust font sizes. This allows the GTK version of
    line_styles.py to more closely match GTKAgg, previously the markers were being drawn too large. - SC

2005-03-01 Added Eric’s contourf routines

2005-03-01 Added start of proper agg SWIG wrapper. I would like to
  expose agg functionality directly a the user level and this module will serve that purpose eventually, and will hopefully take over most of the functionality of the current _image and _backend_agg modules. - JDH
2005-02-28 Fixed polyfit / polyval to convert input args to float
  arrays - JDH
2005-02-25 Add experimental feature to backend_gtk.py to enable/disable
  double buffering (DBL_BUFFER=True/False) - SC
2005-02-24 colors.py change ColorConverter.to_rgb() so it always returns rgb
  (and not rgba), allow cnames keys to be cached, change the exception raised from RuntimeError to ValueError (like hex2color()) hex2color() use a regular expression to check the color string is valid - SC
2005-02-23 Added rc param ps.useafm so backend ps can use native afm
  fonts or truetype. afme breaks mathtext but causes much smaller font sizes and may result in images that display better in some contexts (e.g., pdfs incorporated into latex docs viewed in acrobat reader). I would like to extend this approach to allow the user to use truetype only for mathtext, which should be easy.
2005-02-23 Used sequence protocol rather than tuple in agg collection
  drawing routines for greater flexibility - JDH

2005-02-22 0.72.1 released

2005-02-21 fixed linestyles for collections – contour now dashes for
  levels <0

2005-02-21 fixed ps color bug - JDH

2005-02-15 fixed missing qt file

2005-02-15 banished error_msg and report_error. Internal backend
  methods like error_msg_gtk are preserved. backend writers, check your backends, and diff against 0.72 to make sure I did the right thing! - JDH

2005-02-14 Added enthought traits to matplotlib tree - JDH

2005-02-14 0.72 released

2005-02-14 fix bug in cbook alltrue() and onetrue() - SC

2005-02-11 updated qtagg backend from Ted - JDH

2005-02-11 matshow fixes for figure numbering, return value and docs - FP

2005-02-09 new zorder example for fine control in zorder_demo.py - FP

2005-02-09 backend renderer draw_lines now has transform in backend,
  as in draw_markers; use numerix in _backend_agg, aded small line optimization to agg

2005-02-09 subplot now deletes axes that it overlaps

2005-02-08 Added transparent support for gzipped files in load/save - Fernando
  Perez (FP from now on).
2005-02-08 Small optimizations in PS backend. They may have a big impact for
  large plots, otherwise they don’t hurt - FP
2005-02-08 Added transparent support for gzipped files in load/save - Fernando
  Perez (FP from now on).
2005-02-07 Added newstyle path drawing for markers - only implemented
  in agg currently - JDH

2005-02-05 Some superscript text optimizations for ticking log plots

2005-02-05 Added some default key press events to pylab figures: ‘g’
  toggles grid - JDH
2005-02-05 Added some support for handling log switching for lines
  that have nonpos data - JDH
2005-02-04 Added Nadia’s contour patch - contour now has matlab
  compatible syntax; this also fixed an unequal sized contour array bug- JDH
2005-02-04 Modified GTK backends to allow the FigureCanvas to be resized
  smaller than its original size - SC

2005-02-02 Fixed a bug in dates mx2num - JDH

2005-02-02 Incorporated Fernando’s matshow - JDH

2005-02-01 Added Fernando’s figure num patch, including experemental
  support for pylab backend switching, LineCOllection.color warns, savefig now a figure method, fixed a close(fig) bug - JDH

2005-01-31 updated datalim in contour - JDH

2005-01-30 Added backend_qtagg.py provided by Sigve Tjora - SC

2005-01-28 Added tk.inspect rc param to .matplotlibrc. IDLE users
  should set tk.pythoninspect:True and interactive:True and backend:TkAgg
2005-01-28 Replaced examples/interactive.py with an updated script from
  Fernando Perez - SC
2005-01-27 Added support for shared x or y axes. See
  examples/shared_axis_demo.py and examples/ganged_plots.py
2005-01-27 Added Lee’s patch for missing symbols leq and LEFTbracket
  to _mathtext_data - JDH
2005-01-26 Added Baptiste’s two scales patch – see help(twinx) in the
  pylab interface for more info. See also examples/two_scales.py
2005-01-24 Fixed a mathtext parser bug that prevented font changes in
  sub/superscripts - JDH
2005-01-24 Fixed contour to work w/ interactive changes in colormaps,
  clim, etc - JDH

2005-01-21 matplotlib-0.71 released

2005-01-21 Refactored numerix to solve vexing namespace issues - JDH

2005-01-21 Applied Nadia’s contour bug fix - JDH

2005-01-20 Made some changes to the contour routine - particularly
  region=1 seems t fix a lot of the zigzag strangeness. Added colormaps as default for contour - JDH
2005-01-19 Restored builtin names which were overridden (min, max,
  abs, round, and sum) in pylab. This is a potentially significant change for those who were relying on an array version of those functions that previously overrode builtin function names. - ADS
2005-01-18 Added accents to mathtext: hat, breve, grave, bar,
  acute, tilde, vec, dot, ddot. All of them have the same syntax, e.g., to make an overbar you do bar{o} or to make an o umlaut you do ddot{o}. The shortcuts are also provided, e.g., “o ‘e `e ~n .x ^y - JDH

2005-01-18 Plugged image resize memory leaks - JDH

2005-01-18 Fixed some mathtext parser problems relating to superscripts

2005-01-17 Fixed a yticklabel problem for colorbars under change of
  clim - JDH
2005-01-17 Cleaned up Destroy handling in wx reducing memleak/fig from
  approx 800k to approx 6k- JDH

2005-01-17 Added kappa to latex_to_bakoma - JDH

2005-01-15 Support arbitrary colorbar axes and horizontal colorbars - JDH

2005-01-15 Fixed colormap number of colors bug so that the colorbar
  has the same discretization as the image - JDH

2005-01-15 Added Nadia’s x,y contour fix - JDH

2005-01-15 backend_cairo: added PDF support which requires pycairo 0.1.4.
  Its not usable yet, but is ready for when the Cairo PDF backend matures - SC

2005-01-15 Added Nadia’s x,y contour fix

2005-01-12 Fixed set clip_on bug in artist - JDH

2005-01-11 Reverted pythoninspect in tkagg - JDH

2005-01-09 Fixed a backend_bases event bug caused when an event is
  triggered when location is None - JDH
2005-01-07 Add patch from Stephen Walton to fix bug in pylab.load()
  when the % character is included in a comment. - ADS
2005-01-07 Added markerscale attribute to Legend class. This allows
  the marker size in the legend to be adjusted relative to that in the plot. - ADS
2005-01-06 Add patch from Ben Vanhaeren to make the FigureManagerGTK vbox a
  public attribute - SC

2004-12-30 Release 0.70

2004-12-28 Added coord location to key press and added a
  examples/picker_demo.py

2004-12-28 Fixed coords notification in wx toolbar - JDH

2004-12-28 Moved connection and disconnection event handling to the
  FigureCanvasBase. Backends now only need to connect one time for each of the button press, button release and key press/release functions. The base class deals with callbacks and multiple connections. This fixes flakiness on some backends (tk, wx) in the presence of multiple connections and/or disconnect - JDH
2004-12-27 Fixed PS mathtext bug where color was not set - Jochen
  please verify correct - JDH
2004-12-27 Added Shadow class and added shadow kwarg to legend and pie
  for shadow effect - JDH

2004-12-27 Added pie charts and new example/pie_demo.py

2004-12-23 Fixed an agg text rotation alignment bug, fixed some text
  kwarg processing bugs, and added examples/text_rotation.py to explain and demonstrate how text rotations and alignment work in matplotlib. - JDH

2004-12-22 0.65.1 released - JDH

2004-12-22 Fixed colorbar bug which caused colorbar not to respond to
  changes in colormap in some instances - JDH
2004-12-22 Refactored NavigationToolbar in tkagg to support app
  embedding , init now takes (canvas, window) rather than (canvas, figman) - JDH
2004-12-21 Refactored axes and subplot management - removed
  add_subplot and add_axes from the FigureManager. classic toolbar updates are done via an observer pattern on the figure using add_axobserver. Figure now maintains the axes stack (for gca) and supports axes deletion. Ported changes to GTK, Tk, Wx, and FLTK. Please test! Added delaxes - JDH
2004-12-21 Lots of image optimizations - 4x performance boost over
  0.65 JDH
2004-12-20 Fixed a figimage bug where the axes is shown and modified
  tkagg to move the destroy binding into the show method.
2004-12-18 Minor refactoring of NavigationToolbar2 to support
  embedding in an application - JDH

2004-12-14 Added linestyle to collections (currently broken) - JDH

2004-12-14 Applied Nadia’s setupext patch to fix libstdc++ link
  problem with contour and solaris -JDH
2004-12-14 A number of pychecker inspired fixes, including removal of
  True and False from cbook which I erroneously thought was needed for python2.2 - JDH
2004-12-14 Finished porting doc strings for set introspection.
  Used silent_list for many get funcs that return lists. JDH

2004-12-13 dates.py: removed all timezone() calls, except for UTC - SC

2004-12-13 0.65 released - JDH

2004-12-13 colors.py: rgb2hex(), hex2color() made simpler (and faster), also
  rgb2hex() - added round() instead of integer truncation hex2color() - changed 256.0 divisor to 255.0, so now ‘#ffffff’ becomes (1.0,1.0,1.0) not (0.996,0.996,0.996) - SC

2004-12-11 Added ion and ioff to pylab interface - JDH

2004-12-11 backend_template.py: delete FigureCanvasTemplate.realize() - most

  backends don’t use it and its no longer needed

  backend_ps.py, backend_svg.py: delete show() and draw_if_interactive() - they are not needed for image backends

  backend_svg.py: write direct to file instead of StringIO - SC

2004-12-10 Added zorder to artists to control drawing order of lines,
  patches and text in axes. See examples/zoder_demo.py - JDH

2004-12-10 Fixed colorbar bug with scatter - JDH

2004-12-10 Added Nadia Dencheva <dencheva@stsci.edu> contour code - JDH

2004-12-10 backend_cairo.py: got mathtext working - SC

2004-12-09 Added Norm Peterson’s svg clipping patch

2004-12-09 Added Matthew Newville’s wx printing patch

2004-12-09 Migrated matlab to pylab - JDH

2004-12-09 backend_gtk.py: split into two parts
  - backend_gdk.py - an image backend
  - backend_gtk.py - A GUI backend that uses GDK - SC
2004-12-08 backend_gtk.py: remove quit_after_print_xvfb(*args), show_xvfb(),
  Dialog_MeasureTool(gtk.Dialog) one month after sending mail to matplotlib-users asking if anyone still uses these functions - SC
2004-12-02 backend_bases.py, backend_template.py: updated some of the method
  documentation to make them consistent with each other - SC
2004-12-04 Fixed multiple bindings per event for TkAgg mpl_connect and
  mpl_disconnect. Added a “test_disconnect” command line parameter to coords_demo.py JTM

2004-12-04 Fixed some legend bugs JDH

2004-11-30 Added over command for oneoff over plots. e.g., over(plot, x,
  y, lw=2). Works with any plot function.

2004-11-30 Added bbox property to text - JDH

2004-11-29 Zoom to rect now respect reversed axes limits (for both
  linear and log axes). - GL
2004-11-29 Added the over command to the matlab interface. over
  allows you to add an overlay plot regardless of hold state. - JDH
2004-11-25 Added Printf to mplutils for printf style format string
  formatting in C++ (should help write better exceptions)
2004-11-24 IMAGE_FORMAT: remove from agg and gtkagg backends as its no longer
  used - SC
2004-11-23 Added matplotlib compatible set and get introspection. See
  set_and_get.py
2004-11-23 applied Norbert’s patched and exposed legend configuration
  to kwargs - JDH

2004-11-23 backend_gtk.py: added a default exception handler - SC

2004-11-18 backend_gtk.py: change so that the backend knows about all image
  formats and does not need to use IMAGE_FORMAT in other backends - SC
2004-11-18 Fixed some report_error bugs in string interpolation as
  reported on SF bug tracker- JDH
2004-11-17 backend_gtkcairo.py: change so all print_figure() calls render using
  Cairo and get saved using backend_gtk.print_figure() - SC
2004-11-13 backend_cairo.py: Discovered the magic number (96) required for
  Cairo PS plots to come out the right size. Restored Cairo PS output and added support for landscape mode - SC

2004-11-13 Added ishold - JDH

2004-11-12 Added many new matlab colormaps - autumn bone cool copper
  flag gray hot hsv jet pink prism spring summer winter - PG

2004-11-11 greatly simplify the emitted postscript code - JV

2004-11-12 Added new plotting functions spy, spy2 for sparse matrix
  visualization - JDH
2004-11-11 Added rgrids, thetragrids for customizing the grid
  locations and labels for polar plots - JDH

2004-11-11 make the Gtk backends build without an X-server connection - JV

2004-11-10 matplotlib/__init__.py: Added FROZEN to signal we are running under
  py2exe (or similar) - is used by backend_gtk.py - SC
2004-11-09 backend_gtk.py: Made fix suggested by maffew@cat.org.au
  to prevent problems when py2exe calls pygtk.require(). - SC
2004-11-09 backend_cairo.py: Added support for printing to a fileobject.
  Disabled cairo PS output which is not working correctly. - SC

2004-11-08 matplotlib-0.64 released

2004-11-04 Changed -dbackend processing to only use known backends, so
  we don’t clobber other non-matplotlib uses of -d, like -debug.
2004-11-04 backend_agg.py: added IMAGE_FORMAT to list the formats that the
  backend can save to. backend_gtkagg.py: added support for saving JPG files by using the GTK backend - SC
2004-10-31 backend_cairo.py: now produces png and ps files (although the figure
  sizing needs some work). pycairo did not wrap all the necessary functions, so I wrapped them myself, they are included in the backend_cairo.py doc string. - SC
2004-10-31 backend_ps.py: clean up the generated PostScript code, use
  the PostScript stack to hold itermediate values instead of storing them in the dictionary. - JV
2004-10-30 backend_ps.py, ft2font.cpp, ft2font.h: fix the position of
  text in the PostScript output. The new FT2Font method get_descent gives the distance between the lower edge of the bounding box and the baseline of a string. In backend_ps the text is shifted upwards by this amount. - JV
2004-10-30 backend_ps.py: clean up the code a lot. Change the
  PostScript output to be more DSC compliant. All definitions for the generated PostScript are now in a PostScript dictionary ‘mpldict’. Moved the long comment about drawing ellipses from the PostScript output into a Python comment. - JV
2004-10-30 backend_gtk.py: removed FigureCanvasGTK.realize() as its no longer
  needed. Merged ColorManager into GraphicsContext backend_bases.py: For set_capstyle/joinstyle() only set cap or joinstyle if there is no error. - SC
2004-10-30 backend_gtk.py: tidied up print_figure() and removed some of the
  dependency on widget events - SC
2004-10-28 backend_cairo.py: The renderer is complete except for mathtext,
  draw_image() and clipping. gtkcairo works reasonably well. cairo does not yet create any files since I can’t figure how to set the ‘target surface’, I don’t think pycairo wraps the required functions - SC
2004-10-28 backend_gtk.py: Improved the save dialog (GTK 2.4 only) so it
  presents the user with a menu of supported image formats - SC
2004-10-28 backend_svg.py: change print_figure() to restore original face/edge
  color backend_ps.py : change print_figure() to ensure original face/edge colors are restored even if there’s an IOError - SC

2004-10-27 Applied Norbert’s errorbar patch to support barsabove kwarg

2004-10-27 Applied Norbert’s legend patch to support None handles

2004-10-27 Added two more backends: backend_cairo.py, backend_gtkcairo.py
  They are not complete yet, currently backend_gtkcairo just renders polygons, rectangles and lines - SC

2004-10-21 Added polar axes and plots - JDH

2004-10-20 Fixed corrcoef bug exposed by corrcoef(X) where X is matrix
  - JDH
2004-10-19 Added kwarg support to xticks and yticks to set ticklabel
  text properties – thanks to T. Edward Whalen for the suggestion

2004-10-19 Added support for PIL images in imshow(), image.py - ADS

2004-10-19 Re-worked exception handling in _image.py and _transforms.py
  to avoid masking problems with shared libraries. - JTM
2004-10-16 Streamlined the matlab interface wrapper, removed the
  noplot option to hist - just use mlab.hist instead.
2004-09-30 Added Andrew Dalke’s strftime code to extend the range of
  dates supported by the DateFormatter - JDH

2004-09-30 Added barh - JDH

2004-09-30 Removed fallback to alternate array package from numerix
  so that ImportErrors are easier to debug. JTM

2004-09-30 Add GTK+ 2.4 support for the message in the toolbar. SC

2004-09-30 Made some changes to support python22 - lots of doc
  fixes. - JDH

2004-09-29 Added a Verbose class for reporting - JDH

2004-09-28 Released 0.63.0

2004-09-28 Added save to file object for agg - see
  examples/print_stdout.py

2004-09-24 Reorganized all py code to lib subdir

2004-09-24 Fixed axes resize image edge effects on interpolation -
  required upgrade to agg22 which fixed an agg bug related to this problem

2004-09-20 Added toolbar2 message display for backend_tkagg. JTM

2004-09-17 Added coords formatter attributes. These must be callable,

  > and return a string for the x or y data. These will be used to format the x and y data for the coords box. Default is the axis major formatter. e.g.:

  # format the coords message box def price(x): return ‘$%1.2f’%x ax.format_xdata = DateFormatter(‘%Y-%m-%d’) ax.format_ydata = price

2004-09-17 Total rewrite of dates handling to use python datetime with
  num2date, date2num and drange. pytz for timezone handling, dateutils for spohisticated ticking. date ranges from 0001-9999 are supported. rrules allow arbitrary date ticking. examples/date_demo*.py converted to show new usage. new example examples/date_demo_rrule.py shows how to use rrules in date plots. The date locators are much more general and almost all of them have different constructors. See matplotlib.dates for more info.
2004-09-15 Applied Fernando’s backend __init__ patch to support easier
  backend maintenance. Added his numutils to mlab. JDH
2004-09-16 Re-designated all files in matplotlib/images as binary and
  w/o keyword substitution using “cvs admin -kb *.svg …”. See binary files in “info cvs” under Linux. This was messing up builds from CVS on windows since CVS was doing lf -> cr/lf and keyword substitution on the bitmaps. - JTM
2004-09-15 Modified setup to build array-package-specific extensions
  for those extensions which are array-aware. Setup builds extensions automatically for either Numeric, numarray, or both, depending on what you have installed. Python proxy modules for the array-aware extensions import the version optimized for numarray or Numeric determined by numerix. - JTM
2004-09-15 Moved definitions of infinity from mlab to numerix to avoid
  divide by zero warnings for numarray - JTM

2004-09-09 Added axhline, axvline, axhspan and axvspan

2004-08-30 matplotlib 0.62.4 released

2004-08-30 Fixed a multiple images with different extent bug,
  Fixed markerfacecolor as RGB tuple
2004-08-27 Mathtext now more than 5x faster. Thanks to Paul Mcguire
  for fixes both to pyparsing and to the matplotlib grammar! mathtext broken on python2.2
2004-08-25 Exposed Darren’s and Greg’s log ticking and formatting
  options to semilogx and friends

2004-08-23 Fixed grid w/o args to toggle grid state - JDH

2004-08-11 Added Gregory’s log patches for major and minor ticking

2004-08-18 Some pixel edge effects fixes for images

2004-08-18 Fixed TTF files reads in backend_ps on win32.

2004-08-18 Added base and subs properties for logscale plots, user
  modifiable using set_[x,y]scale(‘log’,base=b,subs=[mt1,mt2,…]) - GL
2004-08-18 fixed a bug exposed by trying to find the HOME dir on win32
  thanks to Alan Issac for pointing to the light - JDH

2004-08-18 fixed errorbar bug in setting ecolor - JDH

2004-08-12 Added Darren Dale’s exponential ticking patch

2004-08-11 Added Gregory’s fltkagg backend

2004-08-09 matplotlib-0.61.0 released

2004-08-08 backend_gtk.py: get rid of the final PyGTK deprecation warning by
  replacing gtkOptionMenu with gtkMenu in the 2.4 version of the classic toolbar.
2004-08-06 Added Tk zoom to rect rectangle, proper idle drawing, and
  keybinding - JDH

2004-08-05 Updated installing.html and INSTALL - JDH

2004-08-01 backend_gtk.py: move all drawing code into the expose_event()

2004-07-28 Added Greg’s toolbar2 and backend_*agg patches - JDH

2004-07-28 Added image.imread with support for loading png into
  numerix arrays
2004-07-28 Added key modifiers to events - implemented dynamic updates
  and rubber banding for interactive pan/zoom - JDH
2004-07-27 did a readthrough of SVG, replacing all the string
  additions with string interps for efficiency, fixed some layout problems, added font and image support (through external pngs) - JDH
2004-07-25 backend_gtk.py: modify toolbar2 to make it easier to support GTK+
  2.4. Add GTK+ 2.4 toolbar support. - SC

2004-07-24 backend_gtk.py: Simplified classic toolbar creation - SC

2004-07-24 Added images/matplotlib.svg to be used when GTK+ windows are
  minimised - SC
2004-07-22 Added right mouse click zoom for NavigationToolbar2 panning
  mode. - JTM
2004-07-22 Added NavigationToolbar2 support to backend_tkagg.
  Minor tweak to backend_bases. - JTM
2004-07-22 Incorporated Gergory’s renderer cache and buffer object
  cache - JDH
2004-07-22 Backend_gtk.py: Added support for GtkFileChooser, changed
  FileSelection/FileChooser so that only one instance pops up, and made them both modal. - SC
2004-07-21 Applied backend_agg memory leak patch from hayden -
  jocallo@online.no. Found and fixed a leak in binary operations on transforms. Moral of the story: never incref where you meant to decref! Fixed several leaks in ft2font: moral of story: almost always return Py::asObject over Py::Object - JDH
2004-07-21 Fixed a to string memory allocation bug in agg and image
  modules - JDH
2004-07-21 Added mpl_connect and mpl_disconnect to matlab interface -
  JDH

2004-07-21 Added beginnings of users_guide to CVS - JDH

2004-07-20 ported toolbar2 to wx

2004-07-20 upgraded to agg21 - JDH

2004-07-20 Added new icons for toolbar2 - JDH

2004-07-19 Added vertical mathtext for *Agg and GTK - thanks Jim
  Benson! - JDH

2004-07-16 Added ps/eps/svg savefig options to wx and gtk JDH

2004-07-15 Fixed python framework tk finder in setupext.py - JDH

2004-07-14 Fixed layer images demo which was broken by the 07/12 image
  extent fixes - JDH
2004-07-13 Modified line collections to handle arbitrary length
  segments for each line segment. - JDH
2004-07-13 Fixed problems with image extent and origin -
  set_image_extent deprecated. Use imshow(blah, blah, extent=(xmin, xmax, ymin, ymax) instead - JDH
2004-07-12 Added prototype for new nav bar with codifed event
  handling. Use mpl_connect rather than connect for matplotlib event handling. toolbar style determined by rc toolbar param. backend status: gtk: prototype, wx: in progress, tk: not started - JDH
2004-07-11 backend_gtk.py: use builtin round() instead of redefining it.
  - SC

2004-07-10 Added embedding_in_wx3 example - ADS

2004-07-09 Added dynamic_image_wxagg to examples - ADS

2004-07-09 added support for embedding TrueType fonts in PS files - PEB

2004-07-09 fixed a sfnt bug exposed if font cache is not built

2004-07-09 added default arg None to matplotlib.matlab grid command to
  toggle current grid state

2004-07-08 0.60.2 released

2004-07-08 fixed a mathtext bug for ‘6’

2004-07-08 added some numarray bug workarounds

2004-07-07 0.60 released

2004-07-07 Fixed a bug in dynamic_demo_wx

2004-07-07 backend_gtk.py: raise SystemExit immediately if
  ‘import pygtk’ fails - SC
2004-07-05 Added new mathtext commands over{sym1}{sym2} and
  under{sym1}{sym2}
2004-07-05 Unified image and patch collections colormapping and
  scaling args. Updated docstrings for all - JDH
2004-07-05 Fixed a figure legend bug and added
  examples/figlegend_demo.py - JDH

2004-07-01 Fixed a memory leak in image and agg to string methods

2004-06-25 Fixed fonts_demo spacing problems and added a kwargs
  version of the fonts_demo fonts_demo_kw.py - JDH

2004-06-25 finance.py: handle case when urlopen() fails - SC

2004-06-24 Support for multiple images on axes and figure, with
  blending. Support for upper and lower image origins. clim, jet and gray functions in matlab interface operate on current image - JDH
2004-06-23 ported code to Perry’s new colormap and norm scheme. Added
  new rc attributes image.aspect, image.interpolation, image.cmap, image.lut, image.origin
2004-06-20 backend_gtk.py: replace gtk.TRUE/FALSE with True/False.
  simplified _make_axis_menu(). - SC
2004-06-19 anim_tk.py: Updated to use TkAgg by default (not GTK)
  backend_gtk_py: Added ‘_’ in front of private widget creation functions - SC
2004-06-17 backend_gtk.py: Create a GC once in realise(), not every
  time draw() is called. - SC
2004-06-16 Added new py2exe FAQ entry and added frozen support in
  get_data_path for py2exe - JDH
2004-06-16 Removed GTKGD, which was always just a proof-of-concept
  backend - JDH
2004-06-16 backend_gtk.py updates to replace deprecated functions
  gtk.mainquit(), gtk.mainloop().
    Update NavigationToolbar to use the new GtkToolbar API - SC
2004-06-15 removed set_default_font from font_manager to unify font
  customization using the new function rc. See API_CHANGES for more info. The examples fonts_demo.py and fonts_demo_kw.py are ported to the new API - JDH
2004-06-15 Improved (yet again!) axis scaling to properly handle
  singleton plots - JDH

2004-06-15 Restored the old FigureCanvasGTK.draw() - SC

2004-06-11 More memory leak fixes in transforms and ft2font - JDH

2004-06-11 Eliminated numerix .numerix file and environment variable
  NUMERIX. Fixed bug which prevented command line overrides: –numarray or –numeric. - JTM
2004-06-10 Added rc configuration function rc; deferred all rc param
  setting until object creation time; added new rc attrs: lines.markerfacecolor, lines.markeredgecolor, lines.markeredgewidth, patch.linewidth, patch.facecolor, patch.edgecolor, patch.antialiased; see examples/customize_rc.py for usage - JDH

2004-06-09 0.54.2 released

2004-06-08 Rewrote ft2font using CXX as part of general memory leak
  fixes; also fixed transform memory leaks - JDH

2004-06-07 Fixed several problems with log ticks and scaling - JDH

2004-06-07 Fixed width/height issues for images - JDH

2004-06-03 Fixed draw_if_interactive bug for semilogx;

2004-06-02 Fixed text clipping to clip to axes - JDH

2004-06-02 Fixed leading newline text and multiple newline text - JDH

2004-06-02 Fixed plot_date to return lines - JDH

2004-06-01 Fixed plot to work with x or y having shape N,1 or 1,N - JDH

2004-05-31 Added renderer markeredgewidth attribute of Line2D. - ADS

2004-05-29 Fixed tick label clipping to work with navigation.

2004-05-28 Added renderer grouping commands to support groups in
  SVG/PS. - JDH
2004-05-28 Fixed, this time I really mean it, the singleton plot
  plot([0]) scaling bug; Fixed Flavio’s shape = N,1 bug - JDH

2004-05-28 added colorbar - JDH

2004-05-28 Made some changes to the matplotlib.colors.Colormap to
  propertly support clim - JDH

2004-05-27 0.54.1 released

2004-05-27 Lots of small bug fixes: rotated text at negative angles,
  errorbar capsize and autoscaling, right tick label position, gtkagg on win98, alpha of figure background, singleton plots - JDH
2004-05-26 Added Gary’s errorbar stuff and made some fixes for length
  one plots and constant data plots - JDH
2004-05-25 Tweaked TkAgg backend so that canvas.draw() works
  more like the other backends. Fixed a bug resulting in 2 draws per figure mangager show(). - JTM

2004-05-19 0.54 released

2004-05-18 Added newline separated text with rotations to text.Text
  layout - JDH

2004-05-16 Added fast pcolor using PolyCollections. - JDH

2004-05-14 Added fast polygon collections - changed scatter to use
  them. Added multiple symbols to scatter. 10x speedup on large scatters using *Agg and 5X speedup for ps. - JDH
2004-05-14 On second thought… created an “nx” namespace in
  in numerix which maps type names onto typecodes the same way for both numarray and Numeric. This undoes my previous change immediately below. To get a typename for Int16 useable in a Numeric extension: say nx.Int16. - JTM
2004-05-15 Rewrote transformation class in extension code, simplified
  all the artist constructors - JDH
2004-05-14 Modified the type definitions in the numarray side of
  numerix so that they are Numeric typecodes and can be used with Numeric compilex extensions. The original numarray types were renamed to type<old_name>. - JTM
2004-05-06 Gary Ruben sent me a bevy of new plot symbols and markers.
  See matplotlib.matlab.plot - JDH
2004-05-06 Total rewrite of mathtext - factored ft2font stuff out of
  layout engine and defined abstract class for font handling to lay groundwork for ps mathtext. Rewrote parser and made layout engine much more precise. Fixed all the layout hacks. Added spacing commands / and hspace. Added composite chars and defined angstrom. - JDH
2004-05-05 Refactored text instances out of backend; aligned
  text with arbitrary rotations is now supported - JDH

2004-05-05 Added a Matrix capability for numarray to numerix. JTM

2004-05-04 Updated whats_new.html.template to use dictionary and
  template loop, added anchors for all versions and items; updated goals.txt to use those for links. PG
2004-05-04 Added fonts_demo.py to backend_driver, and AFM and TTF font
  caches to font_manager.py - PEB
2004-05-03 Redid goals.html.template to use a goals.txt file that
  has a pseudo restructured text organization. PG
2004-05-03 Removed the close buttons on all GUIs and added the python
  #! bang line to the examples following Steve Chaplin’s advice on matplotlib dev
2004-04-29 Added CXX and rewrote backend_agg using it; tracked down
  and fixed agg memory leak - JDH

2004-04-29 Added stem plot command - JDH

2004-04-28 Fixed PS scaling and centering bug - JDH

2004-04-26 Fixed errorbar autoscale problem - JDH

2004-04-22 Fixed copy tick attribute bug, fixed singular datalim
  ticker bug; fixed mathtext fontsize interactive bug. - JDH
2004-04-21 Added calls to draw_if_interactive to axes(), legend(),
  and pcolor(). Deleted duplicate pcolor(). - JTM

2004-04-21 matplotlib 0.53 release

2004-04-19 Fixed vertical alignment bug in PS backend - JDH

2004-04-17 Added support for two scales on the “same axes” with tick
  different ticking and labeling left right or top bottom. See examples/two_scales.py - JDH
2004-04-17 Added default dirs as list rather than single dir in
  setupext.py - JDH
2004-04-16 Fixed wx exception swallowing bug (and there was much
  rejoicing!) - JDH
2004-04-16 Added new ticker locator a formatter, fixed default font
  return - JDH
2004-04-16 Added get_name method to FontProperties class. Fixed font lookup
  in GTK and WX backends. - PEB

2004-04-16 Added get- and set_fontstyle msethods. - PEB

2004-04-10 Mathtext fixes: scaling with dpi, - JDH

2004-04-09 Improved font detection algorithm. - PEB

2004-04-09 Move deprecation warnings from text.py to __init__.py - PEB

2004-04-09 Added default font customization - JDH

2004-04-08 Fixed viewlim set problem on axes and axis. - JDH

2004-04-07 Added validate_comma_sep_str and font properties paramaters to
  __init__. Removed font families and added rcParams to FontProperties __init__ arguments in font_manager. Added default font property parameters to .matplotlibrc file with descriptions. Added deprecation warnings to the get_ - and set_fontXXX methods of the Text object. - PEB

2004-04-06 Added load and save commands for ASCII data - JDH

2004-04-05 Improved font caching by not reading AFM fonts until needed.
  Added better documentation. Changed the behaviour of the get_family, set_family, and set_name methods of FontProperties. - PEB

2004-04-05 Added WXAgg backend - JDH

2004-04-04 Improved font caching in backend_agg with changes to
  font_manager - JDH
2004-03-29 Fixed fontdicts and kwargs to work with new font manager -
  JDH

This is the Old, stale, never used changelog

2002-12-10 - Added a TODO file and CHANGELOG. Lots to do – get

  > crackin’!

  - Fixed y zoom tool bug
  - Adopted a compromise fix for the y data clipping problem. The problem was that for solid lines, the y data clipping (as opposed to the gc clipping) caused artifactual horizontal solid lines near the ylim boundaries. I did a 5% offset hack in Axes set_ylim functions which helped, but didn’t cure the problem for very high gain y zooms. So I disabled y data clipping for connected lines . If you need extensive y clipping, either plot(y,x) because x data clipping is always enabled, or change the _set_clip code to ‘if 1’ as indicated in the lines.py src. See _set_clip in lines.py and set_ylim in figure.py for more information.
2002-12-11 - Added a measurement dialog to the figure window to

  > measure axes position and the delta x delta y with a left mouse drag. These defaults can be overridden by deriving from Figure and overrriding button_press_event, button_release_event, and motion_notify_event, and _dialog_measure_tool.

  - fixed the navigation dialog so you can check the axes the navigation buttons apply to.

2003-04-23 Released matplotlib v0.1

2003-04-24 Added a new line style PixelLine2D which is the plots the

  markers as pixels (as small as possible) with format symbol ‘,’

  Added a new class Patch with derived classes Rectangle, RegularPolygon and Circle

2003-04-25 Implemented new functions errorbar, scatter and hist

> Added a new line type ‘|’ which is a vline. syntax is plot(x, Y, ‘|’) where y.shape = len(x),2 and each row gives the ymin,ymax for the respective values of x. Previously I had implemented vlines as a list of lines, but I needed the efficientcy of the numeric clipping for large numbers of vlines outside the viewport, so I wrote a dedicated class Vline2D which derives from Line2D

2003-05-01

> Fixed ytick bug where grid and tick show outside axis viewport with gc clip

2003-05-14

> Added new ways to specify colors 1) matlab format string 2) html-style hex string, 3) rgb tuple. See examples/color_demo.py

2003-05-28

> Changed figure rendering to draw form a pixmap to reduce flicker. See examples/system_monitor.py for an example where the plot is continusouly updated w/o flicker. This example is meant to simulate a system monitor that shows free CPU, RAM, etc…

2003-08-04

> Added Jon Anderson’s GTK shell, which doesn’t require pygtk to have threading built-in and looks nice!

2003-08-25

> Fixed deprecation warnings for python2.3 and pygtk-1.99.18

2003-08-26

> Added figure text with new example examples/figtext.py

2003-08-27

> Fixed bugs i figure text with font override dictionairies and fig text that was placed outside the window bounding box

2003-09-1 thru 2003-09-15

> Added a postscript and a GD module backend

2003-09-16

> Fixed font scaling and point scaling so circles, squares, etc on lines will scale with DPI as will fonts. Font scaling is not fully implemented on the gtk backend because I have not figured out how to scale fonts to arbitrary sizes with GTK

2003-09-17

> Fixed figure text bug which crashed X windows on long figure text extending beyond display area. This was, I believe, due to the vestigial erase functionality that was no longer needed since I began rendering to a pixmap

2003-09-30 Added legend

2003-10-01 Fixed bug when colors are specified with rgb tuple or hex
  string.
2003-10-21 Andrew Straw provided some legend code which I modified
  and incorporated. Thanks Andrew!
2003-10-27 Fixed a bug in axis.get_view_distance that affected zoom in

  versus out with interactive scrolling, and a bug in the axis text reset system that prevented the text from being redrawn on a interactive gtk view lim set with the widget

  Fixed a bug in that prevented the manual setting of ticklabel strings from working properly

2003-11-02 - Do a nearest neighbor color pick on GD when
  allocate fails
2003-11-02
  - Added pcolor plot
  - Added MRI example
  - Fixed bug that screwed up label position if xticks or yticks were empty
  - added nearest neighbor color picker when GD max colors exceeded
  - fixed figure background color bug in GD backend
2003-11-10 - 2003-11-11
  - major refactoring.
    - Ticks (with labels, lines and grid) handled by dedicated class
    - Artist now know bounding box and dpi
    - Bounding boxes and transforms handled by dedicated classes
    - legend in dedicated class. Does a better job of alignment and bordering. Can be initialized with specific line instances. See examples/legend_demo2.py

2003-11-14 Fixed legend positioning bug and added new position args

2003-11-16 Finsihed porting GD to new axes API

2003-11-20 - add TM for matlab on website and in docs

2003-11-20 - make a nice errorbar and scatter screenshot

2003-11-20 - auto line style cycling for multiple line types
  broken

2003-11-18 (using inkrect) :logical rect too big on gtk backend

2003-11-18 ticks don’t reach edge of axes in gtk mode –
  rounding error?

2003-11-20 - port Gary’s errorbar code to new API before 0.40

2003-11-20 - problem with stale _set_font. legend axes box
  doesn’t resize on save in GTK backend – see htdocs legend_demo.py

2003-11-21 - make a dash-dot dict for the GC

2003-12-15 - fix install path bug