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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

# the bar
x = np.where(np.random.rand(500) > 0.7, 1.0, 0.0)

axprops = dict(xticks=[], yticks=[])
barprops = dict(aspect='auto',, interpolation='nearest')

fig = plt.figure()

# a vertical barcode
ax1 = fig.add_axes([0.1, 0.3, 0.1, 0.6], **axprops)
ax1.imshow(x.reshape((-1, 1)), **barprops)

# a horizontal barcode
ax2 = fig.add_axes([0.3, 0.1, 0.6, 0.1], **axprops)
ax2.imshow(x.reshape((1, -1)), **barprops)


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

Keywords: matplotlib code example, codex, python plot, pyplot Gallery generated by Sphinx-Gallery