color.gradient: Calculate an arbitrary sequence of colors

Description

color.gradient is now just a call to color.scale with a
vector of equally spaced integers (1:nslices). The function is kept for
backward compatibility.

Usage

color.gradient(reds,greens,blues,nslices=50)

Value

A vector of hexadecimal color values as used by col.

Arguments

reds,greens,blues

vectors of the values of the color components
as 0 to 1.