Besides the package already recommended, the rainbow() function in base R
has rudimentary capabilities of that type.

Sarah
On Jan 25, 2012 4:38 PM, "Jeffrey Joh" <johjeffrey@hotmail.com> wrote:

>
> The gray (level) function returns different shades of gray, where level is
> a vector of numbers ranging from 0 to 1.  0 is white and 1 is black and
> everything in between is a shade of gray.
>
> Is there a function that will let me choose two different colors?  For
> example, a 0 might be blue and 1 might be red and in between might be a mix.
>
> Jeffrey
>
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