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Raise an error or a warning when ylim's min == 0 and yscale == "log" #7299

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NelleV opened this issue Oct 17, 2016 · 2 comments
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Raise an error or a warning when ylim's min == 0 and yscale == "log" #7299

NelleV opened this issue Oct 17, 2016 · 2 comments
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Difficulty: Easy https://matplotlib.org/devdocs/devel/contribute.html#good-first-issues

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@NelleV
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NelleV commented Oct 17, 2016 •
edited
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import matplotlib.pyplot as plt
import numpy as np

y = np.arange(3000, 112471, 10000)

fig, ax = plt.subplots()
ax.set_yscale("log")
ax.plot(y, linewidth=0, marker=".")
ax.set_ylim((0, 1e5))

yields:

figure_2

Basically, the ymin gets ignored (sometimes) when ymin == 0 and yscale == 0.

The code should raise an error or at least a warning.

version: 2.0.0b4.post2455+g063cd41
@NelleV NelleV added the Difficulty: Easy https://matplotlib.org/devdocs/devel/contribute.html#good-first-issues label Oct 17, 2016
cfackler added a commit to cfackler/matplotlib that referenced this issue Oct 31, 2016
@cfackler
Warn on invalid log axis limits, per issue matplotlib#7299
bf0dfde 
An attempt to call set_xlim() or set_ylim() with non-positive limits
on a log-scale axis will produce a warning.
@cfackler cfackler mentioned this issue Oct 31, 2016
Merged
NelleV added a commit that referenced this issue Oct 31, 2016
@NelleV
Merge pull request #7367 from cfackler/log-axis-limits-warning
a30f451 
Warn on invalid log axis limits, per issue #7299
bcongdon pushed a commit to bcongdon/matplotlib that referenced this issue Nov 8, 2016
@cfackler @bcongdon
Warn on invalid log axis limits, per issue matplotlib#7299
9240d08 
An attempt to call set_xlim() or set_ylim() with non-positive limits
on a log-scale axis will produce a warning.
bcongdon pushed a commit to bcongdon/matplotlib that referenced this issue Nov 8, 2016
@cfackler @bcongdon
Warn on invalid log axis limits, per issue matplotlib#7299
fe91b6b 
An attempt to call set_xlim() or set_ylim() with non-positive limits
on a log-scale axis will produce a warning.
@dstansby
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dstansby commented Jan 5, 2017

Looks like this is fixed now.

@efiring
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efiring commented Jan 6, 2017

Right, it is fixed in master.

@efiring efiring closed this as completed Jan 6, 2017
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