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<h1>Create 2D bar graphs in different planes<a class="headerlink" href="#create-2d-bar-graphs-in-different-planes" title="Permalink to this headline">¶</a></h1>

Demonstrates making a 3D plot which has 2D bar graphs projected onto

planes y=0, y=1, etc.

<div class="highlight-python notranslate"><div class="highlight"><pre>from mpl_toolkits.mplot3d import Axes3D

import matplotlib.pyplot as plt

import numpy as np

# Fixing random state for reproducibility

<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.random.seed.html#numpy.random.seed" title="View documentation for numpy.random.seed">np.random.seed</a>(19680801)

fig = <a href="../../api/_as_gen/matplotlib.pyplot.figure.html#matplotlib.pyplot.figure" title="View documentation for matplotlib.pyplot.figure">plt.figure</a>()

ax = fig.add_subplot(111, projection='3d')

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

yticks = [3, 2, 1, 0]

for c, k in zip(colors, yticks):

# Generate the random data for the y=k 'layer'.

xs = <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.arange.html#numpy.arange" title="View documentation for numpy.arange">np.arange</a>(20)

ys = <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.random.rand.html#numpy.random.rand" title="View documentation for numpy.random.rand">np.random.rand</a>(20)

# You can provide either a single color or an array with the same length as

# xs and ys. To demonstrate this, we color the first bar of each set cyan.

cs = [c] * len(xs)

cs[0] = 'c'

# Plot the bar graph given by xs and ys on the plane y=k with 80% opacity.

ax.bar(xs, ys, zs=k, zdir='y', color=cs, alpha=0.8)

ax.set_xlabel('X')

ax.set_ylabel('Y')

ax.set_zlabel('Z')

# On the y axis let's only label the discrete values that we have data for.

ax.set_yticks(yticks)

<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="View documentation for matplotlib.pyplot.show">plt.show</a>()

</pre></div>

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<a class="reference download internal" href="../../_downloads/bars3d.py" download=""><code class="xref download docutils literal notranslate">Download Python source code: bars3d.py</code></a></div>

<a class="reference download internal" href="../../_downloads/bars3d.ipynb" download=""><code class="xref download docutils literal notranslate">Download Jupyter notebook: bars3d.ipynb</code></a></div>

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Keywords: matplotlib code example, codex, python plot, pyplot

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