Bug summary

In aprojection='3d' axis, a scatter plot with thec argument to colour the points is showing black markers in the position of nan values if thealpha argument is passed. If thealpha argument is not present, the nan values are not displayed, as expected. If thealpha argument is present, even withalpha = 1, the markers are coloured black.

Code for reproduction

n_x=200n_y=1n_z=200_x=np.linspace(-10,10,n_x)_y=0_z=np.linspace(-10,10,n_z)_xx,_yy,_zz=np.meshgrid(_x,_y,_z,indexing='ij')c=np.array(np.arange(n_x*n_y*n_z,dtype=float).reshape(n_x,n_y,n_z))c[int(n_x/4):int(n_x/2),:,:]=np.nanfig=plt.figure(figsize=(12,5))ax0=fig.add_subplot(121,projection='3d')ax0.scatter(_xx,_yy,_zz,c=c,marker='s')ax0.set_title('`alpha` OFF')ax1=fig.add_subplot(122,projection='3d')ax1.set_title('`alpha` ON')scat3d=ax1.scatter(_xx,_yy,_zz,c=c,marker='s',alpha=1)plt.show()

Actual outcome

Expected outcome

Additional information

No response

Operating system

Ubuntu

Matplotlib Version

3.7.0

Matplotlib Backend

module://matplotlib_inline.backend_inline

Python version

Python 3.10.9

Jupyter version

6.5.2

Installation

conda