[R] Comparison Operator

[Don MacQueen]

grep() by itself isn't quite right for this job:

>   a<-"Is a Fish"
>   b<-"aFish"
>   if (grep(b,a)) c<-TRUE
Error in if (grep(b, a)) c <- TRUE : argument is of length zero

-Don

At 6:24 PM -0500 5/29/03, Dirk Eddelbuettel wrote:
>On Thu, May 29, 2003 at 05:11:24PM -0600, mhoward at micron.com wrote:
>>  Does R have a comparison operator similar to the Like function, for example:
>>
>>  a<-"Is a Fish"
>>  b<-"Fish"
>>
>>  if(b in a){c<-TRUE}
>
>You probably want grep:
>
>  > a<-"Is a Fish"
>>  b<-"Fish"
>>  if (grep(b,a)) c<-TRUE
>  > c
>[1] TRUE
>
>Hth, Dirk
>
>--
>Don't drink and derive. Alcohol and analysis don't mix.
>
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-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA