Hi Steve,
Take a look at ?matplot; it might be useful in this particular case.

HTH,

Jorge


On Mon, Jun 29, 2009 at 2:16 PM, Steve Hong <seunghong@wisc.edu> wrote:

> Dear List,
>
> I have (for example) 50 observations collected from 50 experimental sites
> and want to look at changes of 50 observations as function of time in a
> graph. I found that I could do that using R-code below:
>
> time2 <- 1:25
> y1=rnorm(25, mean=0, sd=1)
> y2=rnorm(25, mean=0, sd=1)
> ...
> y50=rnorm(25, mean=2, sd=1)
> plot(time2, y1, type='b', xlim=range(0,30), ylim=range(y1, y2), xlab='x',
> ylab='y', pch="1",col=3)
> points(time2, y2, type='b', col="red", xlab='x', ylab='y', pch="2")
> ...
> points(time2, y50, type='b', col="red", xlab='x', ylab='y', pch="50")
>
> Also, I wanted to add IDs of 50 individual sites within each lines but
> found it does not work using 'pch' within 'points' function. Do you have any
> suggestion?
>
> Thank you in advance,
>
> Steve
>
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