Here is a possible solution: > A [1] 200 201 202 203 204 205 206 207 208 209 210 > B [1] 201 204 209 > which(!is.na(match(A,B))) [1] 2 5 10 >
Hope this helps, Sincerely, Erin On Wed, Oct 8, 2008 at 10:19 AM, mentor_ <[EMAIL PROTECTED]> wrote: > > Hi, > > I have a vector A with (200, 201, 202, 203, 204, ... 210) and a vector B > with (201, 204, 209). > Now I would like to get the position in vector A matches with the entries in > vector B > So what I want to have is the following result: > [1] 2 5 10 > > I tried the following: > grep(B, A) > > grep(c(B), A) > > A <- as.character(A) > B <- as.character(B) > > grep(B, A) > grep(c(B), A) > > and several other combinations. But nothing is giving me the right result?! > Does anyone know why? > > Cheers, > Mentor > -- > View this message in context: > http://www.nabble.com/Using-grep-tp19881017p19881017.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: [EMAIL PROTECTED] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
