[R] Search a function name in a string

[Gabor Grothendieck]

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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