Dear Evrim, That is easy to do with the ggplot2 package. You only need the data in a "long" format. melt() is very usefull to convert data from a wide to a long format.
library(ggplot2) n <- 100 Wide <- data.frame(X1 = rnorm(n, mean = -0.5), X2 = rnorm(n, mean = 0, sd = 2), X3 = rnorm(n, mean = 0.5)) Long <- melt(Wide) ggplot(Long, aes(x = value, fill = variable)) + geom_histogram(position = position_dodge()) #some alternatives ggplot(Long, aes(x = value, fill = variable)) + geom_histogram() ggplot(Long, aes(x = value)) + geom_histogram() + facet_wrap(~ variable) ggplot(Long, aes(x = value)) + geom_histogram() + 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 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 evrim akar Verzonden: woensdag 25 maart 2009 15:40 Aan: r-help@r-project.org Onderwerp: [R] histogram plots with many different samples Dear R users, I would like to draw some histograms as seen in the page whose address I wrote below. I searched through the web a lot and I found a page which describes how I can do it for older versions of R. For newer versions they recommend to install the package R.basics in R.clusters but this does not exist. The address of the web page is http://www1.maths.lth.se/help/R/plot.histogram/ Unfortunately I could not find any other resource or help. Is it possible to make histograms like I wanted with R? If so, could you please give any advise on how I can do it? Thank you, Regards, evrim [[alternative HTML version deleted]] ______________________________________________ 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.
