Re: [R] red-black-green color palette?
Jake Michaelson [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
I'm working on some heatmaps, and the person I'm working with would
prefer a red-black-green color palette (red denoting gene induction and
green denoting gene repression). Does such a palette exist already?
If not, is there an easy way to create one?
Here are four ways:
showpanel - function(Colors)
{
image(matrix(1:length(Colors), ncol=1), col=Colors, xaxt=n, yaxt=n )
}
oldpar - par(mfrow=c(4,2))
# Method 1 (colorRampPalette was new in R 2.1.0) in grDevices
# Same as function with same name in dichromat package?
showpanel(colorRampPalette( c(green, black, red), space=rgb)(32))
showpanel(colorRampPalette( c(green, black, red), space=rgb)(64))
# Method 2
library(gplots)
showpanel(greenred(32))
showpanel(redgreen(64))
# Method 3
library(geneplotter)
showpanel(greenred.colors(32))
showpanel(greenred.colors(64))
# Method 4
library(marray)
pal - maPalette(low=green, high=red,mid=black)
maColorBar(seq(-2,2, 0.2), col=pal, horizontal=TRUE, k=0)
maColorBar(seq(-2,2, 0.1), col=pal, horizontal=TRUE, k=0)
efg
--
Earl F. Glynn
Scientific Programmer
Stowers Institute for Medical Research
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Re: [R] red-black-green color palette?
Le 03.08.2005 18:23, Jake Michaelson a écrit : I'm working on some heatmaps, and the person I'm working with would prefer a red-black-green color palette (red denoting gene induction and green denoting gene repression). Does such a palette exist already? If not, is there an easy way to create one? Thanks, Jake greenred in gplots is what you are looking for. Cheers, Romain -- visit the R Graph Gallery : http://addictedtor.free.fr/graphiques ~ ~~ Romain FRANCOIS - http://addictedtor.free.fr ~~ Etudiant ISUP - CS3 - Industrie et Services ~~http://www.isup.cicrp.jussieu.fr/ ~~ Stagiaire INRIA Futurs - Equipe SELECT ~~ http://www.inria.fr/recherche/equipes/select.fr.html~~ ~ __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] red-black-green color palette?
Jake Michaelson wrote: I'm working on some heatmaps, and the person I'm working with would prefer a red-black-green color palette (red denoting gene induction and green denoting gene repression). Does such a palette exist already? If not, is there an easy way to create one? See ?maPalette in the marray package of Bioconductor. HTH, Jim Thanks, Jake __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
