Closed
Description
Assigning "none" to facecolor or color parameter does not work any longer for 3D scatter plots. My current version of matplotlib is 3.2.2
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
np.random.seed(2121)
x = np.random.randn(3, 10)
# %% 2D (still working)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.scatter(*x[0:2, :], marker='o', facecolor='blue', color='red', s=50) # working
fig = plt.figure()
ax = fig.add_subplot(111)
ax.scatter(*x[0:2, :], marker='o', facecolor='none', color='red', s=50) # working
fig = plt.figure()
ax = fig.add_subplot(111)
ax.scatter(*x[0:2, :], marker='o', facecolor='blue', color='none', s=50) # working
# %% 3D (not working any longer)
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(*x, marker='o', facecolor='blue', color='red', s=50) # working
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(*x, marker='o', facecolor="none", color='red', s=50) # NOT working
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(*x, marker='o', facecolor='blue', color="none", s=50) # NOT workingThe console returns the following error:
<mpl_toolkits.mplot3d.art3d.Path3DCollection at 0x7f668ea53b90>Traceback (most recent call last):
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 496, in _draw_idle
self.draw()
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/backends/backend_agg.py", line 393, in draw
self.figure.draw(self.renderer)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/figure.py", line 1736, in draw
renderer, self, artists, self.suppressComposite)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/image.py", line 137, in _draw_list_compositing_images
a.draw(renderer)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/axes3d.py", line 293, in draw
reverse=True)):
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/axes3d.py", line 292, in <lambda>
key=lambda col: col.do_3d_projection(renderer),
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/art3d.py", line 540, in do_3d_projection
fcs = (_zalpha(self._facecolor3d, vzs) if self._depthshade else
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/art3d.py", line 847, in _zalpha
rgba = np.broadcast_to(mcolors.to_rgba_array(colors), (len(zs), 4))
File "<__array_function__ internals>", line 6, in broadcast_to
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/numpy/lib/stride_tricks.py", line 182, in broadcast_to
return _broadcast_to(array, shape, subok=subok, readonly=True)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/numpy/lib/stride_tricks.py", line 127, in _broadcast_to
op_flags=['readonly'], itershape=shape, order='C')
ValueError: operands could not be broadcast together with remapped shapes [original->remapped]: (0,4) and requested shape (10,4)
Traceback (most recent call last):
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 496, in _draw_idle
self.draw()
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/backends/backend_agg.py", line 393, in draw
self.figure.draw(self.renderer)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/figure.py", line 1736, in draw
renderer, self, artists, self.suppressComposite)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/image.py", line 137, in _draw_list_compositing_images
a.draw(renderer)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/axes3d.py", line 293, in draw
reverse=True)):
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/axes3d.py", line 292, in <lambda>
key=lambda col: col.do_3d_projection(renderer),
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/art3d.py", line 540, in do_3d_projection
fcs = (_zalpha(self._facecolor3d, vzs) if self._depthshade else
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/mpl_toolkits/mplot3d/art3d.py", line 847, in _zalpha
rgba = np.broadcast_to(mcolors.to_rgba_array(colors), (len(zs), 4))
File "<__array_function__ internals>", line 6, in broadcast_to
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/numpy/lib/stride_tricks.py", line 182, in broadcast_to
return _broadcast_to(array, shape, subok=subok, readonly=True)
File "/home/vanwynch/anaconda3/lib/python3.7/site-packages/numpy/lib/stride_tricks.py", line 127, in _broadcast_to
op_flags=['readonly'], itershape=shape, order='C')
ValueError: operands could not be broadcast together with remapped shapes [original->remapped]: (0,4) and requested shape (10,4)
The workaround is to use (0, 0, 0, 0) as color/facecolor rather than "none" :
# %% 3D workaround
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(*x, marker='o', facecolor='blue', color='red', s=50) # working
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(*x, marker='o', facecolor=(0, 0, 0, 0), color='red', s=50) # working
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(*x, marker='o', facecolor='blue', color=(0, 0, 0, 0), s=50) # working