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Description
Bug summary
I could not plot a 1-channel image while I was trying to populate a Subplots figure, although I can visualize it by using plt.imshow().
Code for reproduction
fig, axes = plt.subplots(3, 2, num=0)
# fig.canvas.mpl_connect('key_press_event', on_press)
h, w = image_size
h, w = int(h), int(w)
ax1 = axes[0][0].imshow(np.zeros((h, w, 3), dtype=np.float32))
ax2 = axes[0][1].imshow(np.zeros((h, w, 3), dtype=np.float32))
ax3 = axes[1][0].imshow(np.zeros((h, w, 3), dtype=np.float32))
ax4 = axes[1][1].imshow(np.zeros((h, w, 3), dtype=np.float32))
ax5 = axes[2][0].imshow(np.zeros((h, w), dtype=np.float32))
ax6 = axes[2][1].imshow(np.zeros((h, w), dtype=np.float32))
image_np = <(h,w) uint8 or float32>
image_pil = Image.fromarray(image_np).convert('RGB')
...
# ax5.set_data(image_np) # Fails!
# ax5.set_data(image_pil) # Works!
plt.imshow(image_np) # Works!
plt.draw()
plt.pause(1e-9)Actual outcome
Expected outcome
I used the Paint to generate the following image to demonstrate what I was expecting.
Additional information
No response
Operating system
Ubuntu 20.04
Matplotlib Version
3.5.1
Matplotlib Backend
TkAgg
Python version
Python 3.8.10
Jupyter version
No response
Installation
pip