Re: [R] Perl-style regexes and capturing results

From: Prof Brian Ripley <>
Date: Fri 05 May 2006 - 00:00:27 EST

On Thu, 4 May 2006, Sean Davis wrote:

> Just a quick question....
> In perl, I can capture parts of a regex like /(\w)\/(\d)/ to get back $1 and
> $2 containing the parts of the regex in parentheses. Is there a parallel in
> R?

Yes. See ?gsub and especially the examples. This is not specific to Perl, and \1 and \2 are more commonly used, including in R.

Brian D. Ripley,        
Professor of Applied Statistics,
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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Received on Fri May 05 00:17:23 2006

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