[R] How to overlap two density plots?

[Jared O'Connell]

My apologies, the previous replies did not show up for me.

On Sat, Apr 26, 2008 at 1:49 PM, Jared O'Connell
<jared.oconnell at gmail.com> wrote:
> Very näively, you could do something like this,
>
>  plot(density(A))
>  lines(density(B),col=2)
>
>  , and tinker your xlim and ylim as suitable.  The Cairo library gives
>  a pretty example,
>
>  data(iris)
>  attach(iris)
>  plot(Petal.Length, rep(-0.03,length(Species)), xlim=c(1,7),
>           ylim=c(0,1.7), xlab="Petal.Length", ylab="Density",
>           pch=21, cex=1.5, col="#00000001", main = "Iris (yet again)",
>           bg=c("#ff000020","#00ff0020","#0000ff20")[unclass(Species)])
>  for (i in 1:3) polygon(density(Petal.Length[unclass(Species)==i],bw=0.2),col=c("#ff000040","#00ff0040","#0000ff40")[i])
>