Hi Steven, grep uses regex... so you can use this:
-grep("age$",x): it says: match "a", then "g", then "e" and stop. The "$" menas until here and no more. > grep("age$",x) [1] 5 2016-05-04 1:02 GMT-05:00 Jim Lemon <drjimle...@gmail.com>: > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.