[R] Is there some way to append to a pdf after its device has been closed?

jim holtman jholtman at gmail.com
Mon Dec 29 21:27:22 CET 2008

Why don't you just output all the plot to a single file by opening
'pdf', doing the plots, 'dev.off()'.  Why do you need so many files

On Mon, Dec 29, 2008 at 2:57 PM, Alex Pine <alex.pine at nyu.edu> wrote:
> Hello all,
> My question has to do with writing to pdf/ps files. Currently, my R program
> requires 100+ pdf devices to be open, which is over the limit of 64 devices
> that can be open at the same time, causing R to throw an exception. My
> problem could be solved if I could append to a pdf file after its initial
> device has been closed, but so far I haven't been able to figure out a way
> to do that. If one calls pdf(file="myfile"), and "myfile" already exists, it
> will be overwritten. Is there any way that I can make the pdf() function
> append to the existing file instead? And if not, is there any way to call a
> program like pdfmerge ( http://microtronyx.com/pdfmerge/ ) from inside R
> code? I know I could simply write to a different pdf file every time I would
> otherwise do an append and then merge those files once my R program has
> completed, but in my case that would lead to the creation of literally
> thousands of pdf files before I merged them all together, and I would like
> to avoid that if possible.
> Thank you for any help you can give,
> Alex
>        [[alternative HTML version deleted]]
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Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

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