Try  sub("\\.[^.]+$", "",  basename(FILELIST))

Thanks,
Wojtek


On Wed, Jan 15, 2014 at 4:37 PM, Fisher Dennis <fisher@plessthan.com> wrote:

> R 3.0.2
> OS X
>
> Colleagues
>
> I am writing code to read a large number of files in a particular folder.
>  In some situations, there may be two versions of the file with different
> extensions, e.g.:
>         FILE.csv
>         FILE.xls
> I extracted the portion before the extension with:
>         sub("\\..*$", "", basename(FILELIST))
> then used
>         duplicated
> to find duplicates.  All was well until I encountered files named:
>         FILE.XXX.csv
>         FILE.YYY.xls
>
> My regular expression extracted only the “FILE” portion of the text and
> claimed that the filenames (without the extensions) matched.  Can someone
> provide me with the appropriate regular expression to deal with this?
>  Thanks.
>
> Dennis
>
>
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone: 1-866-PLessThan (1-866-753-7784)
> Fax: 1-866-PLessThan (1-866-753-7784)
> www.PLessThan.com
>
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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