On Fri, Jan 9, 2009 at 10:23 AM, Rau, Roland <r...@demogr.mpg.de> wrote:
> Hi,
>
>> [mailto:r-help-boun...@r-project.org] On Behalf Of Henrique
>> Dallazuanna
>>
>> Try this also:
>>
>> substr(basename(myfile), 1, nchar(basename(myfile)) - 4)
>>
>
> This, of course, assumes that the extensions are always 3 characters.
The regex solutions posted did not make this assumption.
>
> P.S. Any suggestions how to become more proficient with regular
> expressions? The O'Reilly book ("Mastering...")? Whenever I tried
> anything more complicated than basic usage (things like ^ $ * . ) in R,
> I was way faster to write a new function (like above) instead of finding
> a regex solution.
See the links in the Links box at:
http://gsubfn.googlecode.com
>
> By the way: it might be still possible to *write* regular expressions,
> but what about code re-use? Are there people who can easily *read*
> complicated regular expressions?
>
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