Re: [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, [EMAIL PROTECTED] 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

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Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
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