Dear John, You need to change colour = "darkgreen" into aes(colour = Food). This will give a different colour along Food.
HTH, 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 thierry.onkel...@inbo.be www.inbo.be To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey -----Oorspronkelijk bericht----- Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens John Kane Verzonden: maandag 10 augustus 2009 21:30 Aan: r-h...@stat.math.ethz.ch Onderwerp: [R] ggplot: colours to geom_segments Just as an exercise I am tying to add colours to a geom_segment command. I can get one colour but not a sequence of colours. Can anyone suggest how I can get the green lines in the plot below to be different colours? I thought I could use a palatte of colours but that did not seem to work. Thanks ======================================================================== = library(ggplot2) xx <- structure(list(Food = structure(c(2L, 1L, 3L, 4L), .Label = c("Bread", "Milk", "Potatoes", "Rice"), class = "factor"), Expense = c(25, 49, 34, 15)), .Names = c("Food", "Expense"), row.names = c(NA, -4L), class = "data.frame") p <- ggplot(xx, aes(x = 0, xend = Expense, y = Food, yend = Food)) pa <- p + geom_point(aes(Expense, Food)) + geom_segment(colour="darkgreen") + xlab("Food") + geom_vline(xintercept=40, colour='red') pa ______________________________________________ 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. Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is door een geldig ondertekend document. The views expressed in this message and any annex are purely those of the writer and may not be regarded as stating an official position of INBO, as long as the message is not confirmed by a duly signed document. ______________________________________________ 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.
