red through orange to yellow colormap
cmap=autumncolormap(n)
:n integer >= 3, the colormap size. : :cmap matrix with 3 columns [R,G,B]. :
autumncolormap computes a colormap with n colors varying from red through orange to yellow.
f = `scf`_();
`plot3d1`_();
f.color_map = autumncolormap(32);