"""
============
Barcode Demo
============

This demo shows how to produce a one-dimensional image, or "bar code".
"""
import matplotlib.pyplot as plt
import numpy as np

# Fixing random state for reproducibility
np.random.seed(19680801)

# the bar
x = np.random.rand(500) > 0.7

barprops = dict(aspect='auto', cmap='binary', interpolation='nearest')

fig = plt.figure()

# a vertical barcode
ax1 = fig.add_axes([0.1, 0.1, 0.1, 0.8])
ax1.set_axis_off()
ax1.imshow(x.reshape((-1, 1)), **barprops)

# a horizontal barcode
ax2 = fig.add_axes([0.3, 0.4, 0.6, 0.2])
ax2.set_axis_off()
ax2.imshow(x.reshape((1, -1)), **barprops)

plt.show()

#############################################################################
#
# ------------
#
# References
# """"""""""
#
# The use of the following functions, methods and classes is shown
# in this example:

import matplotlib
matplotlib.axes.Axes.imshow
matplotlib.pyplot.imshow