from matplotlib import cbook, pyplot as plt, style

import numpy as np

style.use("classic")

datafile = cbook.get_sample_data('membrane.dat', asfileobj=False)

# convert data to mV

x = 1000 * 0.1 * np.fromstring(open(datafile, 'rb').read(), np.float32)

# 0.0005 is the sample interval

t = 0.0005 * np.arange(len(x))

plt.figure(1, figsize=(7, 1), dpi=100)

ax = plt.subplot(111, facecolor='y')

plt.plot(t, x)

plt.text(0.5, 0.5, 'matplotlib', color='r',

fontsize=40, fontname=['Courier', 'DejaVu Sans Mono'],

horizontalalignment='center',

verticalalignment='center',

transform=ax.transAxes,

)

plt.axis([1, 1.72, -60, 10])

plt.gca().set_xticklabels([])

plt.gca().set_yticklabels([])