Message-ID: <18261.6849.552348.138200@stat.math.ethz.ch>
Date: 2007-12-04T09:15:45Z
From: Martin Maechler
Subject: about color palettes, colorRamp etc
In-Reply-To: <fj1l8m$jqd$1@ger.gmane.org>
[if you get this twice: it seems to have not made it through, yesterday]
>>>>> "Earl" == Earl F Glynn <efg at stowers-institute.org>
>>>>> on Mon, 3 Dec 2007 13:26:11 -0600 writes:
Earl> "affy snp" <affysnp at gmail.com> wrote in message
Earl> news:5032046e0711301734o2bdd53a5p3da1276bc68b28ba at mail.gmail.com...
>> For example, it should go from very red---red---less
>> red---dark----green---very green coinciding with the
>> descending order of values, just like the very left panel
>> shown in
>> http://www.bme.unc.edu/research/Bioinformatics.FunctionalGenomics.html
Earl> This looks like the MatLab palette that's in
Earl> tim.colors:
Earl> library(fields) # tim.colors: Matlab-like color palette
Earl> N <- 100
Earl> par(lend="square")
Earl> plot(rep(1,N), type="h", col=tim.colors(N), lwd=6, ylim=c(0,1))
Well, the R help page ?colorRamp
in its 'examples' section
has an example of this Matlab-lik color scheme, calling them
'jet.colors', easily constructed with the nice
colorRampPalette() function [I've just posted about to R-help as well].
Please say
example(colorRamp)
in R
and slowly watch the output, and I expect you will never ever
want to use the horrible "Matlab-like" color palette again..
Regards,
Martin Maechler, ETH Zurich
Earl> efg
Earl> Earl F. Glynn
Earl> Scientific Programmer
Earl> Stowers Institute for Medical Research