heatmap

> Hi,
 > i created a graph with heatmap(sma) function:
 >
 > heatmap(dataHeat(x))
 >
 > and I wish to change the gradation of colors from blue to red, how could
 > i do?
 > Using "heatmap(dataHeat(x), col=c(2,4))" i will use only 2 colors
 > without gradation.
 >
The color.gradient function in the plotrix package returns a sequence of 
interpolated colors between any two starting colors or incomplete 
sequences of primaries.

I noticed that a function named ramp (in the base package?) was 
mentioned, but I could not find it. If there is a function equivalent to 
color.gradient, I would like to know about it, as I try to avoid 
duplicating functions.

Jim