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tvlct, r, g, b [, /fixedsize]
[x11] Sets a color table. The arguments are three
one-dimensional arrays of equal size, specifying the relative
contributions (between 0 and 1) of red (r),
green (g), and blue (b) as a function of
increasing color cell index. If the number of elements of the arrays is
unequal to the number of color cells, then interpolation in the arrays
is performed so that the first element of the arrays specifies the color
for color cell index 0, and the last element specifies the color for the
last color cell.
If /fixedsize is specified, then no interpolation into the
existing color table is done, but instead the new values are inserted
into successive color cells of the existing color table, until either
the new values run out or all existing color ramp cells are serviced.
See also: Image Display, tv