hline at y=0 appears after setting yscale to log #8783
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Comments
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On the other hand, you asked it to draw a line at 0 a it made a best-effort to do so. What does a line at a negative position do? |
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Do nothing, which is what happens when the call to scatter is not included. |
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Trying a line at a negative position ( Changing the code to import matplotlib.pyplot as plt
fig, ax = plt.subplots()
ax.scatter([1], [1])
plt.semilogy()
ax.axhline(0)
plt.show()ignores the hline completely, and just shows the single scatter point as it was before. In my opinion I think this should be the behavior of `ax.set_yscale('log') too. At the very least they should be consistent which I think is what #8537 is for. |
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Fixed by #8836 |
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Bug report
Bug summary
Calling
ax.axhline(0)after setting the y-scale to log rescales the y-axis to make the horizontal line appear at 1e-300.Code for reproduction
Actual outcome
with the warning
Expected outcome
I would expect the horizontal line to be ignored, and axis limits to remain as they were originally.
Matplotlib version
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