R help - Oct 2007 - Adding pagebreaks on files???

Hi 
Does anyone know if its possible to add pagebreaks to an pdf through an R
command? I'm running a loop  where each session exports an pdf graph. Each
image becomes a separate file, but I would like to have them in the same
document but on separate pages.

Does anyone know a solution or workaround?

Regards, Tom
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On Mon, 2007-10-29 at 12:36 -0700, Tom.O wrote:
> Hi 
> Does anyone know if its possible to add pagebreaks to an pdf through an R
> command? I'm running a loop  where each session exports an pdf graph.
Each
> image becomes a separate file, but I would like to have them in the same
> document but on separate pages.
see ?pdf and argument onefile, which should be true:

pdf("my_pdf.pdf", onefile = TRUE) # onefile = TRUE is default so
redundant
plot(1:10)
plot(1:10)
plot(1:10)
dev.off()
> 
> Does anyone know a solution or workaround?
You mention a loop and a session. I don't get this. By session do you
mean each iteration of the loop?

For this, you could use the following template:

pdf("my_loop_pdf.pdf", onefile = TRUE)
for(i in 1:10) {
plot(1:10 * i)
}
dev.off()

Is this what you wanted?

If not, you'll have to explain more.
> 
> Regards, Tom
HTH

G
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 Gavin Simpson                 [t] +44 (0)20 7679 0522
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I do this all the time.  Simply,

a) Open your pdf file using the pdf function.
b) Do a bunch of plots.  Because now the pdf file is your active device,
every time you call a new plot you should get a new page.  You can also
use par(mfrow=...) to split the page (the same way you do it on a
window), etc.
c) Close the connection to the pdf using dev.off().

Julian

Tom.O wrote:
> Hi 
> Does anyone know if its possible to add pagebreaks to an pdf through an R
> command? I'm running a loop  where each session exports an pdf graph.
Each
> image becomes a separate file, but I would like to have them in the same
> document but on separate pages.
> 
> Does anyone know a solution or workaround?
> 
> Regards, Tom