OK, regexpr gets me what I needed, thanks to all.. One more thing, say I have a Table like:
0 RAW1 RAW2 RAW3 AVE1 AVE2 AVE3 1 1 2 5 2.3 1.2 4.5 2 0 3 6 1.7 2.2 3.5 3 3 1 6 0.1 3.9 1.6 and I want to create a sub table that only has the RAW columns. Problem is I won't know what the column names will be, only that they either contain "RAW" or "AVE" and they may not be grouped together. Mike -----Original Message----- From: Don MacQueen [mailto:[EMAIL PROTECTED] Sent: Friday, May 30, 2003 8:48 AM To: Dirk Eddelbuettel; mhoward Cc: [EMAIL PROTECTED] Subject: Re: [R] Comparison Operator 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 > >-- >Don't drink and derive. Alcohol and analysis don't mix. > >______________________________________________ >[EMAIL PROTECTED] mailing list >https://www.stat.math.ethz.ch/mailman/listinfo/r-help -- -------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
