[R] reading non-existent files
ripley at stats.ox.ac.uk
Tue Jan 28 16:20:03 CET 2003
On Tue, 28 Jan 2003 Christian.Stratowa at vie.boehringer-ingelheim.com wrote:
> 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.
How can some of `all files from a directory' be missing? Why not read
them via e.g. list.files()?
> Is there a way to check for a null pointer analogous to C, so that
> I can simply skip non-existent filenames?
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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