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Errorbars with yerr fail when fillstyle is specified #19776

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rtobar opened this issue Mar 26, 2021 · 1 comment · Fixed by #19784
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Errorbars with yerr fail when fillstyle is specified #19776

rtobar opened this issue Mar 26, 2021 · 1 comment · Fixed by #19784
Milestone
v3.4.1

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@rtobar
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rtobar commented Mar 26, 2021

Bug report

Bug summary

Errorbar plots don't accept the fillstyle keyword argument anymore when using yerr.

Code for reproduction

import matplotlib.pyplot as plt
plt.errorbar([1, 2, 3, 4, 5], [5, 6, 7, 8, 9], yerr=[[1, 1, 1, 1, 1], [1, 1, 1,1, 1]], ls='None', mfc='r', fillstyle='full', ecolor = 'r', mec='r',marker='s',markersize=7)

Actual outcome

>>> import matplotlib.pyplot as plt
>>> plt.errorbar([1, 2, 3, 4, 5], [5, 6, 7, 8, 9], yerr=[[1, 1, 1, 1, 1], [1, 1, 1,1, 1]], ls='None', mfc='r', fillstyle='full', ecolor = 'r', mec='r',marker='s',markersize=7)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/python_environments/shark/lib/python3.8/site-packages/matplotlib/pyplot.py", line 2741, in errorbar
    return gca().errorbar(
  File "/opt/python_environments/shark/lib/python3.8/site-packages/matplotlib/__init__.py", line 1352, in inner
    return func(ax, *map(sanitize_sequence, args), **kwargs)
  File "/opt/python_environments/shark/lib/python3.8/site-packages/matplotlib/axes/_axes.py", line 3497, in errorbar
    barcols.append(self.vlines(
  File "/opt/python_environments/shark/lib/python3.8/site-packages/matplotlib/__init__.py", line 1352, in inner
    return func(ax, *map(sanitize_sequence, args), **kwargs)
  File "/opt/python_environments/shark/lib/python3.8/site-packages/matplotlib/axes/_axes.py", line 1120, in vlines
    lines.update(kwargs)
  File "/opt/python_environments/shark/lib/python3.8/site-packages/matplotlib/artist.py", line 1062, in update
    raise AttributeError(f"{type(self).__name__!r} object "
AttributeError: 'LineCollection' object has no property 'fillstyle'

Expected outcome

The code to work as before.

Matplotlib version

Installed on a virtual environment via pip install -U matplotlib:

$ pip freeze | grep matplotlib
matplotlib==3.4.0

Downgrading to matplotlib!=3.4 (==3.3.4) works.
rtobar added a commit to ICRAR/shark that referenced this issue Mar 26, 2021
@rtobar
Avoid matplotlib 3.4, it has a bug with errorbars
dbd9942 
Version 3.4 was release just a couple of hours ago, so I hit this
problem just by chance -- and reported it upstream of course, more
details in matplotlib/matplotlib#19776.

Signed-off-by: Rodrigo Tobar <[email protected]>
@anntzer anntzer added this to the v3.4.0 milestone Mar 26, 2021
@QuLogic QuLogic modified the milestones: v3.4.0, v3.4.1 Mar 26, 2021
@smartlixx
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This is caused by errorbar used fillstyle to plot the error bars, which should only be used to plot markers. However, I don't know why this was introduced from v3.3.4 to v3.4.0.

I will add a PR to fix this shortly.

@smartlixx smartlixx mentioned this issue Mar 27, 2021
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@smartlixx smartlixx mentioned this issue Apr 6, 2021
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FIX errorbar problem with fillstyle smartlixx/matplotlib
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@QuLogic @rtobar @anntzer @smartlixx