Hi Gabor and Dimitris, I was wondering if this question was frequent enough to be in the R FAQ under R Miscellanea and thought of something like this
Q. How do I plot two curves on the same graph? A. Plot the first curve using the plot() command and add lines using lines(). For example d1 <- density(rnorm(100)) d2 <- density(rnorm(100)) plot(range(d1$x, d2$x), range(d1$y, d2$y), type = "n", xlab = "x", ylab = "Density") lines(d1, col = "red") lines(d2, col = "blue") Alternatively one can use points() to add points to the plot. If you think this question should be in the FAQ and if you have any comments/changes to the QA then I can request the maintainer of the FAQ to include it. We could also include a lattice solution but I was thinking of not complicating things. Ritwik Sinha On 8/27/06, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > Not sure who maintains the FAQ but its not me. > > > On 8/27/06, Ritwik Sinha <[EMAIL PROTECTED]> wrote: > > This seems to be a common question for new commers to R, does it make sense > > to add it to the R FAQ page? I checked it is not currently there. > > > > Ritwik > > > > > > On 8/23/06, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > > > > > With lattice graphics: > > > > library(lattice) > > d1 <- rnorm(100) > > d2 <- runif(100) > > densityplot(~ d1 + d2, auto.key = TRUE) > > > > On 8/23/06, Antje <[EMAIL PROTECTED] > wrote: > > > Hello, > > > > > > I was wondering if I can plot two curves I get from "density(data)" into > > > one plot. I want to compare both. > > > With the following commad, I just get one curve plotted: > > > > > > plot( density(mydata) ) > > > > > > Sorry for this stupid question but I could not find a solution until > > now... > > > > > > Antje > > > > > > ______________________________________________ > > > R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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. > > > > > > > > > > -- > > Ritwik Sinha > > Graduate Student > > Epidemiology and Biostatistics > > Case Western Reserve University > > > > http://darwin.cwru.edu/~rsinha > -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University http://darwin.cwru.edu/~rsinha ______________________________________________ R-help@stat.math.ethz.ch 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.