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FIX: pcolor/pcolormesh honour edgecolors kwarg when facecolors is set 'none' #12226

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FIX: pcolor/pcolormesh honour edgecolors kwarg when facecolors is set 'none' #12226

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pharshalp
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@pharshalp pharshalp commented Sep 23, 2018 •
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PR Summary

Closes #1302

This fixes the issue #1302 [edgecolor(s) being ignored by pcolor/pcolormesh when facecolor(s) is set to 'none'].

From a quick look at the discussion in #1302 and looking at the underlying code, I think this PR should work. NOTE: I am not entirely familiar with how the Collection object is supposed to behave. If this PR fails the tests then I will close this PR and dig deeper to find the correct approach. (all the tests passed!).

Example:

import matplotlib.pyplot as plt
import numpy as np

plt.pcolor(np.arange(12).reshape(4, 3), edgecolors='red', facecolors='none')
plt.show()

Current outcome:
test

Correct outcome (after applying the fix in this PR):
test1

PR Checklist

  • Has Pytest style unit tests
  • Code is Flake 8 compliant
  • [ ] New features are documented, with examples if plot related
  • Documentation is sphinx and numpydoc compliant
  • [ ] Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
  • [ ] Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

@pharshalp pharshalp changed the title [WIP] pcolor/pcolormesh bug #1302 (edgecolors being ignored by pcolor/pcolormesh when facecolors is set 'none'). pcolor/pcolormesh bug #1302 (edgecolors being ignored by pcolor/pcolormesh when facecolors is set 'none'). Sep 23, 2018
@pharshalp pharshalp changed the title pcolor/pcolormesh bug #1302 (edgecolors being ignored by pcolor/pcolormesh when facecolors is set 'none'). pcolor/pcolormesh bug #1302 (edgecolors being ignored when facecolors is set 'none'). Sep 23, 2018
@pharshalp pharshalp changed the title pcolor/pcolormesh bug #1302 (edgecolors being ignored when facecolors is set 'none'). Fixes #1302 (pcolor/pcolormesh bug - edgecolors being ignored when facecolors is set 'none'). Sep 23, 2018
@dopplershift
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Would you be able to turn your example code above into an image test so that we don't break this in the future?

@jklymak
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jklymak commented Sep 23, 2018

@pharslap, looks great. I took the liberty of editing your title - no need to ref original issue, and description of fix is most helpful...

@jklymak jklymak changed the title Fixes #1302 (pcolor/pcolormesh bug - edgecolors being ignored when facecolors is set 'none'). FIX: pcolor/pcolormesh honour edgecolors kwarg when facecolors is set 'none' Sep 23, 2018
@pharshalp
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Would you be able to turn your example code above into an image test so that we don't break this in the future?

@dopplershift I have added a test that doesn't use image comparison.

@dstansby dstansby added this to the v3.1 milestone Sep 24, 2018
@pharshalp
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@WeatherGod @efiring Could you please take a look at this? Tagging you since you were involved in the discussion on the issue. Thanks!

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efiring commented Sep 25, 2018

I'm pretty sure this is not the right solution. It looks like there is a simple underlying bug that this is not addressing. Investigating...

@pharshalp
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I'm pretty sure this is not the right solution. It looks like there is a simple underlying bug that this is not addressing. Investigating...

Ok. Thanks for taking a look!

@jklymak
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jklymak commented Feb 26, 2019

@efiring - still investigation 😉 I'll assume this can wait for 3.2...

@jklymak jklymak modified the milestones: v3.1.0, v3.2.0 Feb 26, 2019
@efiring efiring self-assigned this May 23, 2019
@tacaswell tacaswell modified the milestones: v3.2.0, v3.3.0 Sep 5, 2019
@QuLogic QuLogic modified the milestones: v3.3.0, v3.4.0 May 2, 2020
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efiring commented Sep 11, 2020

Sorry for the long delay. I will try to take care of this as soon as #6268 goes in.

@efiring efiring mentioned this pull request Sep 14, 2020
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@jklymak jklymak marked this pull request as draft September 28, 2020 19:46
@QuLogic QuLogic modified the milestones: v3.4.0, v3.5.0 Jan 21, 2021
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efiring commented May 13, 2021

This is superseded by #18480. Thank you for the contribution, @pharshalp. Although your PR was not merged, it led to a different solution to the problem.

@efiring efiring closed this May 13, 2021
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pcolormesh bug: edgecolor ignored
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@pharshalp @dopplershift @jklymak @efiring @tacaswell @QuLogic @dstansby