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Unknown Border Appearing When Using pcolor/pcolormesh #16029
Description
Bug report
Bug summary
The color pattern that appears when using imshow, shows along a pcolor grid for an unknown reason. Creates conflicting grid and coloring sequence.
Code for reproduction
import matplotlib.pyplot as plt
import numpy as np
data = np.random.rand(10, 10)
plt.pcolormesh(data, edgecolors="k", linewidth=2)
ax = plt.gca()
ax.set_aspect("equal")
plt.imshow(data)
plt.show()Actual outcome
Expected outcome
Matplotlib version
- Operating system: Fedora 30 x86_64
- Matplotlib version: 3.1.2
- Matplotlib backend: TkAgg
- Python version: 3.7.4
- Other libraries: numpy==1.18.0
Note: matplotlib==3.1.2 was installed via pip
Activity
QuLogic commented on Dec 27, 2019
There is no border; they're plotted on different boundaries. See the pcolormesh documentation on the X/Y arguments vs. the default extent for imshow.
Though it seems pcolormesh does not seem to mention anywhere that the default X/Y are np.arange(len(dimension)), and I think we should mention that.
TheCedarPrince commented on Dec 28, 2019
Hey @QuLogic - got it! After experimenting with the code and documentation more, I was able to get a working example of what I was expecting:
I can put a docs pull request in - would you be willing to review?
dstansby commented on Dec 29, 2019
@TheCedarPrince would be great to have a pull request, and I'd be happy to review it!
TheCedarPrince commented on Dec 29, 2019
Hey @dstansby - I have to admit, I am new to how to contribute to docs. How do I go about doing that here in MPL? If you can point me somewhere, I can go from there.
github-actions commented on Jul 3, 2023
This issue has been marked "inactive" because it has been 365 days since the last comment. If this issue is still present in recent Matplotlib releases, or the feature request is still wanted, please leave a comment and this label will be removed. If there are no updates in another 30 days, this issue will be automatically closed, but you are free to re-open or create a new issue if needed. We value issue reports, and this procedure is meant to help us resurface and prioritize issues that have not been addressed yet, not make them disappear. Thanks for your help!