overlaying different density curves without showing the histogram

Question

I want to be able to show three different density curves on the same axis. I've got the code below so far but i don't know how to combine them to so that they can

curve(dnorm(x,mean=0,sd=1),col="darkgreen",xlim=c(-4,8),ylim=c(0,.8))
curve(dnorm(x,mean = 0,sd=1.5),col="red",xlim = c(-5,8),ylim=c(0,.6))
curve(dnorm(x,mean = 0.5,sd=0.5),col="black",xlim = c(-2,8), ylim =c(0,1))

Please see here: http://stackoverflow.com/questions/6939136/how-to-overlay-density-plots-in-r — socialscientist, Oct 04 '15 at 16:30
If you include `add=TRUE` in the second and third calls to `curve`, they will all appear in the same plot. — eipi10, Oct 04 '15 at 18:02

score 0 · Answer 1 · answered Oct 04 '15 at 20:46

This is the basic solution. You can add more formatting if need be (for axes etc). Note you need to change the xlim and ylim to match on the plots.

curve(dnorm(x,mean=0,sd=1),col="darkgreen",xlim=c(-5,8),ylim=c(0,1), ylab = "")
par(new = TRUE)
curve(dnorm(x,mean = 0,sd=1.5),col="red",xlim = c(-5,8),ylim=c(0,1), ylab = "")
par(new = TRUE)
curve(dnorm(x,mean = 0.5,sd=0.5),col="black",xlim = c(-5,8), ylim =c(0,1), ylab = "")

overlaying different density curves without showing the histogram

1 Answers1