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Fix fill_between with decreasing data #9236

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Merged
merged 2 commits into from
Sep 26, 2017
Merged

Fix fill_between with decreasing data #9236

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e6a115c
BUG: Fix fill_between(x) with decreasing data (Fixes #9235)
dopplershift Sep 26, 2017
61f4fa3
Add test for #9235
dopplershift Sep 26, 2017
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Add test for #9235
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@dopplershift
dopplershift committed Sep 26, 2017
commit 61f4fa319ea60e8c460fd502eca3cbc1bfb09cb4
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212 changes: 212 additions & 0 deletions ...plotlib/tests/baseline_images/test_axes/fill_between_interpolate_decreasing.svg
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22 changes: 22 additions & 0 deletions lib/matplotlib/tests/test_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -968,6 +968,28 @@ def test_fill_between_interpolate():
interpolate=True)


@image_comparison(baseline_images=['fill_between_interpolate_decreasing'],
style='mpl20', remove_text=True)
def test_fill_between_interpolate_decreasing():
p = np.array([724.3, 700, 655])
t = np.array([9.4, 7, 2.2])
prof = np.array([7.9, 6.6, 3.8])

fig = plt.figure(figsize=(9, 9))
ax = fig.add_subplot(1, 1, 1)

ax.plot(t, p, 'tab:red')
ax.plot(prof, p, 'k')

ax.fill_betweenx(p, t, prof, where=prof < t,
facecolor='blue', interpolate=True, alpha=0.4)
ax.fill_betweenx(p, t, prof, where=prof > t,
facecolor='red', interpolate=True, alpha=0.4)

ax.set_xlim(0, 30)
ax.set_ylim(800, 600)


@image_comparison(baseline_images=['symlog'])
def test_symlog():
x = np.array([0, 1, 2, 4, 6, 9, 12, 24])
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