# [R] plot help

Henrique Dallazuanna wwwhsd at gmail.com
Thu Jan 24 11:18:51 CET 2008

```Try this:

#some data
y1=rnorm(1:3)
y2=rnorm(1:3)

#draw two plots on the same screen
par(mfrow=c(2,1),oma = c(6, 0, 5, 0))
par(mar=c(0, 5.1, 0, 5.1))
plot(y1,xaxt="n",type="n") #1st plot
par(mar=c(0, 5.1, 0, 5.1))
plot(y2,xaxt="n",type="n") #2nd plot

#try to draw lines onto each plot on the screen
lines(y2) #draws a line in the 2nd plot
par(mfg=c(1, 1))
lines(y1,col=2) #also draws a line in the 2nd plot, but that's not what I

On 24/01/2008, tom soyer <tom.soyer at gmail.com> wrote:
> Hi,
>
> Suppose I already have two plots on the same screen, and I want to draw
> lines in each of them. Is that possible in R? It seems that once you have
> two plots on the screen, you can only draw lines in the the last plot, never
> the 1st. Here is what I mean:
>
> #some data
> y1=rnorm(1:3)
> y2=rnorm(1:3)
>
> #draw two plots on the same screen
> par(mfrow=c(2,1),oma = c(6, 0, 5, 0))
> par(mar=c(0, 5.1, 0, 5.1))
> plot(y1,xaxt="n",type="n") #1st plot
> par(mar=c(0, 5.1, 0, 5.1))
> plot(y2,xaxt="n",type="n") #2nd plot
>
> #try to draw lines onto each plot on the screen
> lines(y2) #draws a line in the 2nd plot
> lines(y1,col=2) #also draws a line in the 2nd plot, but that's not what I
> want. I want to draw the line in the 1st plot instead.
>
> Does anyone know if after more than one plot were drawn, can I still call
> the 1st plot and draw a line in it?
>
> Thanks,
>
> --
> Tom
>
>         [[alternative HTML version deleted]]
>
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