Hi Yun, If you're asking how to place new graphic material on the same plot (e.g., several lines/points/etc in a single x-y region), this is covered in the Intro to R manual. E.g., you can do:
plot(x1, y1, type='p', xlim=range(x1,x2), ylim=range(y1, y2), xlab='x', ylab='y') points(x2, y2, col="red") see ?lines ?points ?text ?abline Also, see the "new" option in par Best, Matt On 2/23/07, Yun Zhang <[EMAIL PROTECTED]> wrote: > Hi, > > I am trying to plot two distribution graph on one plot. But I dont know > how. I set them to the same x, y limit, even same x, y labels. > > Code: > x1=rnorm(25, mean=0, sd=1) > y1=dnorm(x1, mean=0, sd=1) > > x2=rnorm(25, mean=0, sd=1) > y2=dnorm(x2, mean=0, sd=1) > plot(x1, y1, type='p', xlim=range(x1,x2), ylim=range(y1, y2), xlab='x', > ylab='y') > plot(x2, y2, type='p', col="red", xlab='x', ylab='y') > > They just dont show up in one plot. > > Any hint will be very helpful. > > Thanks, > Yun > > ______________________________________________ > 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. > -- Matthew C Keller Postdoctoral Fellow Virginia Institute for Psychiatric and Behavioral Genetics ______________________________________________ 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.