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# Annotation with units

The example illustrates how to create text and arrow annotations using a centimeter-scale plot.

This example requires `basic_units.py`

    import matplotlib.pyplot as plt
    from basic_units import cm

    fig, ax = plt.subplots()

    ax.annotate("Note 01", [0.5*cm, 0.5*cm])

    # xy and text both unitized
    ax.annotate('local max', xy=(3*cm, 1*cm), xycoords='data',
                xytext=(0.8*cm, 0.95*cm), textcoords='data',
                arrowprops=dict(facecolor='black', shrink=0.05),
                horizontalalignment='right', verticalalignment='top')

    # mixing units w/ nonunits
    ax.annotate('local max', xy=(3*cm, 1*cm), xycoords='data',
                xytext=(0.8, 0.95), textcoords='axes fraction',
                arrowprops=dict(facecolor='black', shrink=0.05),
                horizontalalignment='right', verticalalignment='top')

    ax.set_xlim(0*cm, 4*cm)
    ax.set_ylim(0*cm, 4*cm)
    plt.show()

Total running time of the script: ( 0 minutes 0.026 seconds)

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