Hi Steven, If this is just a one-off, you could do this: grepl("age",x) & nchar(x)<4
returning a logical vector containing TRUE for "age" but not "age2" Jim On Wed, May 4, 2016 at 3:45 PM, Steven Yen <sye...@gmail.com> wrote: > Dear all > In the grep command below, is there a way to identify only "age" and > not "age2"? In other words, I like to greb "age" and "age2" > separately, one at a time. Thanks. > > x<-c("abc","def","rst","xyz","age","age2") > x > > [1] "abc" "def" "rst" "xyz" "age" "age2" > > grep("age2",x) > > [1] 6 > > grep("age",x) # I need to grab "age" only, not "age2" > > [1] 5 6 > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.