You'll need to transform your dataset in a long format first. library(ggplot2) n <- 5 MyValues <- data.frame(Gene = factor(LETTERS[seq_len(n)]), ES = rnorm(n), MEF = rnorm(n), Embrio = rnorm(n), EShyp = rnorm(n)) MyValuesMelt <- melt(MyValues, id.var = "Gene") ggplot(MyValuesMelt, aes(x = Gene, y = value, fill = variable)) + geom_bar(position = "dodge") ggplot(MyValuesMelt, aes(x = Gene, y = value)) + geom_bar(position = "dodge") + facet_grid(. ~ variable)
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 [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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Senthil Kumar M Verzonden: woensdag 6 februari 2008 11:19 Aan: r-help@r-project.org Onderwerp: [R] Histogram/Bar plot graph Hi, I have the following data: > Myvalues Gene ES MEF Embryo ESHyp 1 GeneA -0.38509507 0.00 1.6250 1.7039921 2 GeneB 0.06262914 0.00 1.6250 -0.272033 and so on... I want to plot the expression values of GeneA and GeneB in the different cell/embryo/conditions (columns 2:5 above). Now, if I do: >library(ggplot2) > qplot(x=Gene, Embryo, geom = "bar") I get a plot of GeneA, B...so on only for the Embryo (ie column 4). How do I get to plot multiple instances of Y for the same value of X ? I have tried to find this out myself, but it is a bit confusing and so, I am writing to the list as a last resort. Any help or guidance will be much appreciated. TIA, Senthil ______________________________________________ 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.
