R help - Nov 2008 - post - plotting lines in a divided graphic device

Hi all,
I have a graphic device divided in 2 areas for a plot.
Is it possible to add lines or points in the first plot after the last 
one  have been set, without plotting all the data again ?

Example
par(mfrow(2,1))
plot(1)
plot(2)
lines(c(1,2)) # should be visible in the first plot

Thanks for help.
Greetings

On Fri, 21 Nov 2008, _ wrote:
> Hi all,
> I have a graphic device divided in 2 areas for a plot.
> Is it possible to add lines or points in the first plot after the last one 
> have been set, without plotting all the data again ?
See ?par, look at mfg.  However, you would probably find screen() easier 
to use, and the way you have done this you have lost the coordinate system 
for the first plot and would need plot(1, new=T) to reset it.
>
> Example
> par(mfrow(2,1))
> plot(1)
> plot(2)
> lines(c(1,2)) # should be visible in the first plot
That's not a valid R command.
> Thanks for help.
> Greetings
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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