Hi Yun,

try this.

x1 <- rnorm(10000, 0.5,0.4018)
x2 <- rnorm(10000, 0.01919,0.3969)

d1 <- density(x1)
d2 <- density(x2)

plot(range(d1$x,d2$x), range(d1$y, d2$y), type =
"n",
     xlab = "X", ylab = "Y" )
lines(d1, col = "blue",lwd=2)
lines(d2, col = "red",lwd=2)

Cheers

Nguyen

-----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch on behalf
of Yun Zhang
> Sent: Fri 2/23/2007 7:34 AM
> To: Henrique Dallazuanna
> Cc: r-help@stat.math.ethz.ch
> Subject: Re: [R] How to plot two graphs on one
single plot?
>  
> Thanks. Now R plots two graphs on one plot.
> Yet they are still on two graphs, vertically
parallelized with each other.
>
> But what I want to do is actually plotting two
distribution on one
> single graph, using the same x and y axis. Like:
> |
> |
> |               (dist2)
> |   (dist 1)
> |
> --------------------------->
>
> Is it possible to do that?
>
> Thanks,
> Yun
>
> Henrique Dallazuanna wrote:
> > par(mfrow=c(2,1))
> > #your plot
> > #after plot
> > par(mfrow=c(1,1))
> >
> > On 23/02/07, *Yun Zhang* <yunzhang@princeton.edu
> > <mailto:yunzhang@princeton.edu>> 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
> >

 

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