Dear Domenico, It looks like my question wasn't very clear. I want to specify the colours meself. Colour = z will use default colours and I'd like to change those. I need to change them into red, green, blue and black instead of pink, brown, green and blue.
The solution should have the layout of: ggplot(data = dataset, aes(x = x, y = y, colour = z)) + geom_point() But the colours of: ggplot(data = dataset, aes(x = x, y = y, group = z)) + geom_point(colour = c("red", "green", "blue", "black")) Cheers, Thierry ------------------------------------------------------------------------ ---- 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 [EMAIL PROTECTED] 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 -----Oorspronkelijk bericht----- Van: Domenico Vistocco [mailto:[EMAIL PROTECTED] Verzonden: maandag 3 december 2007 14:08 Aan: ONKELINX, Thierry CC: r-help@r-project.org Onderwerp: Re: [R] ggplot2: Choosing colours qplot(data=dataset, x, y, colour=z) ONKELINX, Thierry wrote: > 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 > [EMAIL PROTECTED] > 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 > > ______________________________________________ > R-help@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@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.