Try this:

gsub("^(\\w*).*$", "\\1", x)

On Wed, May 13, 2009 at 8:41 PM, Stephen J. Barr <stephenjbarr@gmail.com>wrote:

> Hello,
>
> I have several strings where I am trying to eliminate the period and
> everything after the period, using a regular expression. However, I am
> having trouble getting this to work.
>
> > x = "wa.w"
> > gsub(x, "\..*", "", perl=TRUE)
> [1] ""
> Warning messages:
> 1: '\.' is an unrecognized escape in a character string
> 2: unrecognized escape removed from "\..*"
>
> In perl, you can match a single period with \.
> Is this not so even with perl=TRUE. I would like for x to be equal to
> > x = "wa"
>
> What am I missing here?
> -stephen
> ==========================================
> Stephen J. Barr
> University of Washington
> WEB: www.econsteve.com
>
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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