Bug summary

If colors of scatter points are set during the initial call, then later calls of set_facecolor to that artist fail to update the colors. set_edgecolor works as expected. This is happening in 2D and 3D scatter plots (fixing the 2D case should fix both).

Code for reproduction

import matplotlib.pyplot as plt
import matplotlib as mpl
cmap = mpl.colormaps['viridis']
x = np.ones(10)
y = np.linspace(0, 1, 10)

fig, ax = plt.subplots()
scat = ax.scatter(x, y, c=y, cmap='viridis', s=20)
colors = cmap(np.roll(y, 3))
scat.set_edgecolor(colors)
scat.set_facecolor(colors)

Actual outcome

Expected outcome

Result if colors are not passed in the initial scatter call are as expected:

fig, ax = plt.subplots()
scat = ax.scatter(x, y, s=20)
colors = cmap(np.roll(y, 3))
scat.set_edgecolor(colors)
scat.set_facecolor(colors)

Additional information

No response

Operating system

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Matplotlib Version

latest main

Matplotlib Backend

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Python version

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Jupyter version

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Installation

git checkout