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Backport PR #15357 on branch v3.2.x (Add 'step' and 'barstacked' to histogram_histtypes demo) #15377

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Merged
merged 1 commit into from
Oct 4, 2019
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Backport PR #15357 on branch v3.2.x (Add 'step' and 'barstacked' to histogram_histtypes demo) #15377

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31 changes: 23 additions & 8 deletions examples/statistics/histogram_histtypes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,9 @@
================================================================

* Histogram with step curve that has a color fill.
* Histogram with step curve with no fill.
* Histogram with custom and unequal bin widths.
* Two histograms with stacked bars.

Selecting different bin counts and sizes can significantly affect the
shape of a histogram. The Astropy docs have a great section on how to
Expand All @@ -17,19 +19,32 @@

np.random.seed(19680801)

mu = 200
sigma = 25
x = np.random.normal(mu, sigma, size=100)
mu_x = 200
sigma_x = 25
x = np.random.normal(mu_x, sigma_x, size=100)

fig, (ax0, ax1) = plt.subplots(ncols=2, figsize=(8, 4))
mu_w = 200
sigma_w = 10
w = np.random.normal(mu_w, sigma_w, size=100)

ax0.hist(x, 20, density=True, histtype='stepfilled', facecolor='g', alpha=0.75)
ax0.set_title('stepfilled')
fig, axs = plt.subplots(nrows=2, ncols=2)

axs[0, 0].hist(x, 20, density=True, histtype='stepfilled', facecolor='g',
alpha=0.75)
axs[0, 0].set_title('stepfilled')

axs[0, 1].hist(x, 20, density=True, histtype='step', facecolor='g',
alpha=0.75)
axs[0, 1].set_title('step')

axs[1, 0].hist(x, density=True, histtype='barstacked', rwidth=0.8)
axs[1, 0].hist(w, density=True, histtype='barstacked', rwidth=0.8)
axs[1, 0].set_title('barstacked')

# Create a histogram by providing the bin edges (unequally spaced).
bins = [100, 150, 180, 195, 205, 220, 250, 300]
ax1.hist(x, bins, density=True, histtype='bar', rwidth=0.8)
ax1.set_title('unequal bins')
axs[1, 1].hist(x, bins, density=True, histtype='bar', rwidth=0.8)
axs[1, 1].set_title('bar, unequal bins')

fig.tight_layout()
plt.show()