"Charlotte Wright" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] >I have two .txt files with lists of generated data I want to plot them on >the same histogram. I'm aware of the histbackback function, but that is not >really what I am looking for, I just want them on the same histogram but so >they are still grouped separately (different colours, different norm curves >etc). Does anyone know how to do this? Thank you.
Consider these two tips from old postings: # Adapted from Michael Watson, R-Help, 2 Feb 2005 a <- rnorm(15000, mean=1.0) b <- rnorm(20000, mean=1.5) ah <- hist(a,breaks= seq(-5,6,by=0.2),plot=FALSE) bh <- hist(b,breaks= seq(-5,6,by=0.2),plot=FALSE) data <- t(cbind(ah$counts,bh$counts)) barplot(data,beside=TRUE, space=rep(0,2*ncol(data)), col=c("red", "black")) # Alternative to using multiple histograms to compare many variables: # Adapted from Adaikalavan Ramasamy, R-Help, 2 Feb 2005 # simulate data x1 <- rnorm(1000, 0.4, 0.8) x2 <- rnorm(1000, 0.0, 1.0) x3 <- rnorm(1000, -1.0, 1.0) # density plots plot( density(x1), xlim=range( c(x1, x2, x3) ), main="", xlab="" ) lines(density(x2), col=2) lines(density(x3), col=3) # rug plots for displaying actual data points # you can add jitter() to rug() but with 1000 obs not much difference rug(x1, col=1, ticksize=0.01, line=2.5) rug(x2, col=2, ticksize=0.01, line=3.0) rug(x3, col=3, ticksize=0.01, line=3.5) efg Earl F. Glynn Bioinformatics Stowers Institute for Medical Research ______________________________________________ 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.