Generates a repeating red, orange, yellow, green, blue, violet colormap.
PRISM(len)
len |
- |
Optional. An integer, the colormap length. Defaults to the length of the current colormap. |
A table of RGB triples suitable for the SETCOLORMAP function.
clen = length(getcolormap());
W1: density(ravel(rep(0..(clen-1), 32), clen)');sety(0, 12);prism
creates a table of 32 x N (where N == colormap length) RBG values and displays the resulting colors. The resulting image is a vertical plot of the repeating discrete colors red, orange, yellow, green, blue and violet.
W1: flag;showcmap();sety(0, 31)
W2: prism;showcmap();sety(0, 31)
W1 and W2 display discrete, repeating 32x256 colormaps where 256 is the colormap length.
prism by itself sets the colormap and shading.
a = prism or setcolormap(prism) returns the RGB values. In this case, use SETSHADING to make the new colormap take effect on an existing density or 2D plot.
The PRISM colormap is a repeating, rainbow-like cycle of six primary/bright colors, designed to maximize hue distinction.