Re: [R] Search a function name in a string

From: Gabor Grothendieck <ggrothendieck_at_gmail.com>
Date: Tue, 03 Jul 2007 12:03:50 -0400

Parnetheses have special meaning so they must be escaped or specify a character class of 1:

> grep("S\\(.*\\)",c("S(a)","CSP"))
[1] 1
> grep("S[(].*[)]",c("S(a)","CSP"))
[1] 1

On 7/3/07, NOEL Yvonnick <yvonnick.noel_at_free.fr> wrote:
> Hello,
>
> I am trying to find a function name in a string that expresses a
> functional form :
>
> > s = "blabla...S(var)...blabla"
>
> I would like to detect the pattern "S(*)" in s.
>
> I am no guru at regular expressions. Just tried :
>
> > grep("S(.*)",c("S(a)","CSP"))
> [1] 1 2
> >
>
> I expected the pattern to be retrieved only in the first string, so
> obviously this is not correct. Any idea ?
>
> Thank you very much in advance,
>
> Yvonnick Noel, PhD
> U. of Rennes 2
> France
>
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> and provide commented, minimal, self-contained, reproducible code.
>

---

R-help_at_stat.math.ethz.ch mailing list
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. Received on Tue 03 Jul 2007 - 16:44:29 GMT