pixmap from colormap

Syntax:

     set pixmap <index> colormap <name>

Another use of pixmaps is to store a gradient described by a named palette. This is an easy way to specify gradient fill for a rectangular area. It could be used to draw a separate colorbox for that named palette, or even as a background for the entire plot or the entire canvas.

     set palette defined (0 "beige", 1 "light-cyan")
     set colormap new Gradient
     set pixmap 1 colormap Gradient behind
     set pixmap 1 at screen 0,0 size screen 1,1
     plot <something>