black to a light copper tone colormap
cmap=coppercolormap(n)
:n integer >= 3, the colormap size. : :cmap matrix with 3 columns [R,G,B]. :
coppercolormap computes a colormap with n colors varying from black to a light copper tone.
f = `scf`_();
`plot3d1`_();
f.color_map = coppercolormap(32);