ColorRamp different from ColorRampPalette
Thanks Hadley, Is it the solution you would recommend ? rgb(pal.cr((0:40)/40), maxColorValue=255) Etienne
hadley wrote:
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
and 1 to colors" ...colors I guess taken from the gradient, but I don't get the gradient. Etienne -- View this message in context: http://www.nabble.com/ColorRamp-different-from-ColorRampPalette-tp23104641p23104641.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
View this message in context: http://www.nabble.com/ColorRamp-different-from-ColorRampPalette-tp23104641p23105080.html Sent from the R help mailing list archive at Nabble.com.