Look at the output of pal.cr((0:40)/40)
Hadley
On Fri, Apr 17, 2009 at 2:42 PM, Etienne B. Racine <etiennebr at gmail.com>
wrote:
I try to use ColorRamp as ColorRampPalette (i.e. with the same gradient),
but
it seems there is a nuance that I've missed.
pal.crp<-colorRampPalette( c("blue", "white", "red"), space = "rgb")
plot(rep(0,40),pch=16,col=pal.crp(40))
# is great
But, using the same gradient with colorRamp is giving erratic colors.
pal.cr<-colorRamp( c("blue", "white", "red"), space = "rgb")
plot(rep(0,40),pch=16,col=pal.cr((0:40)/40))
# is not great
From the help : "colorRamp returns a function that maps values between 0