[R] colors and palettes and things...

[bogdan romocea]

1. I faced the same issue and came up with the code below. 
2. See rainbow().

allcol <- colors()
png("Rcolors.png",width=1100,height=3000)
par(mai=c(0.4,0.5,0.3,0.2),omi=c(0.2,0,0,0),cex.axis=0.1,pch=15,bg="white")
plot(1,1,xlim=c(1,10),ylim=c(1,66),col=allcol[1],cex=4)
axis(1,at=NULL,labels=FALSE,tick=FALSE)
clr <- 1
for (i in 66:1) for (j in 10:1) {
	if (clr > length(allcol)) break
	points(j,i,col=allcol[clr],cex=4)
	text(j,i,allcol[clr],cex=0.8,pos=1)
	clr <- clr + 1
	}
dev.off()



-----Original Message-----
From: Jeff D. Hamann [mailto:jeff.hamann at forestinformatics.com]
Sent: Monday, May 23, 2005 11:35 AM
To: r-help at stat.math.ethz.ch
Subject: [R] colors and palettes and things... 


After trying to find if there was a color picker in the FAQs and the help,
I thought I would send a post here. I was overwhelmed with all the
wonderful color choices R has predefined (discovered after typing in
colors()) but can't figure out what they all (by name) look like. Is there
a color picker or some other method to display all those colors next to
the name?

I think I can put together palettes, but another question I have then
regards the building of palettes (a list of variable length I can select
or create myself other than the ones defined by Palette) so I can pass
these colors into functions instead of having to predefine a bunch of
colors myself or use the predefined colors like terrain.colors(n)?

Are there groups of colors in the colors() that I can group together to
make some nice palettes for drawing barplots, etc?

Thanks,
Jeff.


-- 
Jeff D. Hamann
Forest Informatics, Inc.
PO Box 1421
Corvallis, Oregon 97339-1421
phone 541-754-1428
fax 541-752-0288
jeff.hamann at forestinformatics.com
www.forestinformatics.com

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