[R] ggplot2: Choosing colours

From: ONKELINX, Thierry <Thierry.ONKELINX_at_inbo.be>
Date: Mon, 3 Dec 2007 12:02:42 +0100


Dear useRs,

I'm trying to specify the colour of a factor with ggplot2. The example below gets me close to what I want, but it's missing a legend.

Any ideas?

Thanks,

Thierry

library(ggplot2)
dataset <- data.frame(x = rnorm(40), y = runif(40), z = gl(4, 10, labels
= LETTERS[1:4]))
ggplot(data = dataset, aes(x = x, y = y, group = z)) + geom_point(colour
= c("red", "green", "blue", "black"))




ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium
tel. + 32 54/436 185
Thierry.Onkelinx_at_inbo.be
www.inbo.be

Do not put your faith in what statistics say until you have carefully considered what they do not say. ~William W. Watt A statistical analysis, properly conducted, is a delicate dissection of uncertainties, a surgery of suppositions. ~M.J.Moroney



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