[R] reading non-existent files

[Ben Bolker]

  ?file.exists

On Tue, 28 Jan 2003 Christian.Stratowa at vie.boehringer-ingelheim.com wrote:

> Dear R-experts
> 
> I would like to read all files from a directory, the files have names
> "myname0001.txt" etc. I paste the directory plus file names and
> use "read.delim()".
> My problem is that some file names are missing, so I get an error
> and my program stops.
> Is there a way to check for a null pointer analogous to C, so that
> I can simply skip non-existent filenames?
> 
> Please do "Reply to all" since in the company I am not subscribed
> to the R-help list.
> 
> Thank you in advance
> Best regards
> Christian Stratowa
> 
> ==============================================
> Christian Stratowa, PhD
> Boehringer Ingelheim Austria
> Dept NCE Lead Discovery - Bioinformatics
> Dr. Boehringergasse 5-11
> A-1121 Vienna, Austria
> Tel.: ++43-1-80105-2470
> Fax: ++43-1-80105-2683
> email: christian.stratowa at vie.boehringer-ingelheim.com
> 
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> 

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