[R] characters in a string

[Romain Francois]

Le 15/09/10 17:16, rajeshj at cse.iitm.ac.in a écrit :
>
>
> Hi,
>
> I need to check if a string "<rh>a,b,c,d<rh>" is delimited by two"<rh>" 's as efficiently as possible(I need to do this a lot of times) and return TRUE. Can someone suggest a good technique?

Hi Rajesh,

 > f <- function( x ) grepl( "^<rh>.*<rh>$", x )
 > f( "<rh>a,b,c,d<rh>" )
[1] TRUE

See ?grepl for details.

Romain

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Romain Francois
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