3D Histograms with colored boxes


Thanks for the help. I’m able to make 3D histograms by option “GLBOX” which is attached here as a sample.

I was wondering if the faces of boxes can be colored? Moreover, if the color of each box can vary with the contents of the box?

GLCOL may be ??

This is amazing! Thank you for telling me this! But the figure, which I will attach it, is a little vague.

Are these figures generated by OpenGL?
So I attempt to make a histogram after read a macro named glh3c.C. The figure is attached also.