?which > which(X) [1] 1 2 3
Max -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Barb, Jennifer (NIH/CIT) [E] Sent: Tuesday, November 20, 2007 3:07 PM To: [EMAIL PROTECTED] Subject: [R] Loc function in R?? Does anyone know which function (if any) will return the index of the true locations in a Boolean vector? For instance: A=c(1,3,5,7,4); B=c(2,4,77,3,3); X=A<B; So X is: > X [1] TRUE TRUE TRUE FALSE FALSE I'd like to know if there is a function that will tell me the locations of where the TRUE values are? for instance a vector that will list that the locations are at 1, 2, 3. This function is sometimes called loc() in other languages. Thanks, Jennifer [[alternative HTML version deleted]] ______________________________________________ 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. ______________________________________________ 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.
