File:Mplwp log2e10.svg

#!/usr/bin/python
# -*- coding: utf8 -*-

import matplotlib.pyplot as plt
import matplotlib as mpl
import numpy as np
from math import *

code_website = 'http://commons.wikimedia.org/wiki/User:Geek3/mplwp'
try:
    import mplwp
except ImportError, er:
    print 'ImportError:', er
    print 'You need to download mplwp.py from', code_website
    exit(1)

name = 'mplwp_log2e10.svg'
fig = mplwp.fig_standard(mpl)

xlim = -1,11; fig.gca().set_xlim(xlim)
ylim = -4,4; fig.gca().set_ylim(ylim)
fig.gca().xaxis.set_major_locator(mpl.ticker.MultipleLocator(1))
mplwp.mark_axeszero(fig.gca())

x = np.linspace(10**ylim[0], xlim[1], 5001)

for label, f in [(u'log\u2082', lambda x: log(x) / log(2)),
                 (u'ln', log),
                 (u'log\u2081\u2080', log10)]:
    y = [f(xx) for xx in x]
    plt.plot(x, y, label=label)

plt.legend(loc='lower center').get_frame().set_alpha(0.9)

plt.savefig(name)
mplwp.postprocess(name)