Quoting David Barron <[EMAIL PROTECTED]>: > Try > > str[grep('[[:upper:]]{3}',str)] >
or more efficiently : grep('[[:upper:]]{3}', str, value = TRUE) > On 06/11/06, Lapointe, Pierre <[EMAIL PROTECTED]> wrote: >> Hello, >> >> I need to identify all elements which have a sequence of 3 consecutive upper >> case letters, anywhere in the string. >> >> I tested my grep expression on this site: http://regexlib.com/RETester.aspx >> >> But when I try it in R, it does not filter anything. >> >> str <-c("AGH", "this WOUld be good", "Not Good at All") >> str[grep('[A-Z]{3}',str)] #looking for a sequence of 3 consecutive upper >> case letters >> >> [1] "AGH" "this WOUld be good" "Not Good at All" >> >> Any idea? >> >> Pierre >> >> ************************************************** >> AVIS DE NON-RESPONSABILITE: Ce document transmis par courrie...{{dropped}} >> >> ______________________________________________ >> R-help@stat.math.ethz.ch 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. >> > > > -- > ================================= > David Barron > Said Business School > University of Oxford > Park End Street > Oxford OX1 1HP > > ______________________________________________ > R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.