On Tue, Aug 7, 2012 at 10:18 PM, Marc Schwartz <marc_schwa...@me.com> wrote: > That will get you values where punctuation characters are used, but there may > be other non-alphanumeric characters in the vector. There may be ASCII > control codes, tabs, newlines, CR, LF, spaces, etc. which would not be found > by using [:punct:]. > > For example: > >> grepl("[[:punct:]]", " ") > [1] FALSE > > > If you want to explicitly look for non-alphanumeric characters, you would be > better off using a negation of [:alnum:] such as: > [..]
> > !grepl("[[:alnum:]]", x) > Good point! Thanks. Liviu ______________________________________________ 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.