Matplotlib: Turning axes off and setting facecolor at the same time not possible?

问题

can someone explain why this simple code wont execute the facecolor command while setting the axis off?

fig = plt.figure(1)
ax = fig.add_subplot(211, facecolor=(0,0,0), aspect='equal')
ax.scatter(np.random.random(10000), np.random.random(10000), c="gray", s=0.25)
ax.axes.set_axis_off()

Thanks in advance!

回答1:

The background patch is part of the axes. So if the axes is turned off, so will the background patch.

Some options:

Re-add the background patch

ax = fig.add_subplot(211, facecolor=(0,0,0), aspect='equal')
ax.set_axis_off()
ax.add_artist(ax.patch)
ax.patch.set_zorder(-1)

Create new patch

ax = fig.add_subplot(211, facecolor=(0,0,0), aspect='equal')
ax.set_axis_off()
ax.add_patch(plt.Rectangle((0,0), 1, 1, facecolor=(0,0,0),
                           transform=ax.transAxes, zorder=-1))

Turn axis spines and ticks invisible

...but keep the axis on.

ax = fig.add_subplot(211, facecolor=(0,0,0), aspect='equal')
for spine in ax.spines.values():
    spine.set_visible(False)
ax.tick_params(bottom=False, labelbottom=False,
               left=False, labelleft=False)

来源：https://stackoverflow.com/questions/60805253/matplotlib-turning-axes-off-and-setting-facecolor-at-the-same-time-not-possible