a little searching would have found:

?file.exists

On Sun, Apr 18, 2010 at 7:54 PM, chrisli1223 <chrisli@austwaterenv.com.au>wrote:

>
> Hi everyone,
>
> I have written a script which exports my graphs as a PDF file using the
> function pdf().
>
> For instance, I run the script and it exports a PDF called "version 1".
> Then, I have got a new dataset and want to run the script again. What it
> usually does is overwriting "version 1". But I want it to check if "version
> 1" already exists. If so, then I want the new graphs to be exported as
> "version 2", and so on.
>
> Is it possible to do it in R?
>
> Thanks in advance,
> Chris
> --
> View this message in context:
> http://n4.nabble.com/Exporting-PDF-tp2015263p2015263.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

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