cmap = prism(m)prism
m-by-3 colormap matrix that repeats the colors red, orange, yellow, green, blue, violet. The default value for
mis the length of the current colormap.
prism, with no input or output arguments, changes the colors of any line objects in the current axes to the prism colors, repeating the colors as needed.
prismcolormap is especially useful with contour plots.
[x,y,z] = peaks(40);
(c) Copyright 1994 by The MathWorks, Inc.