#!/usr/bin/python

from matplotlib.dates import strpdate2num, epoch2num

import numpy as np

from pylab import figure, show, cm

datefmt = "%a %b %d %H:%M:%S CEST %Y"

datafile = "cpu.dat"

def parsedate(x):

global datefmt

try:

res = epoch2num( int(x) )

except:

try:

res = strpdate2num(datefmt)(x)

except:

print("Cannot parse date ('"+x+"')")

exit(1)

return res

# parse data file

t,a,b,c = np.loadtxt(

datafile, delimiter=';',

converters={0:parsedate},

unpack=True)

fig = figure()

ax = fig.add_axes((0.1,0.1,0.7,0.85))

# limit y axis to 0

ax.set_ylim(0);

# colors

colors=['b','g','r']

fill=[(0.5,0.5,1), (0.5,1,0.5), (1,0.5,0.5)]

# plot

for x in [c,b,a]:

ax.plot_date(t, x, '-', lw=2, color=colors.pop())

ax.fill_between(t, x, color=fill.pop())

# legend

ax.legend(['max','avg','min'], loc=(1.03,0.4), frameon=False)

fig.autofmt_xdate()

show()