How do you want your output? If you want a character vector of lowercase letters, just use gsub("[^::A-Z::]","", t) to substitute "" for all non-uppercase characters. strsplit() can lead you to a vector of the single-letter upper case letters.
Best, Michael On Wed, Jun 27, 2012 at 2:15 PM, mdvaan <mathijsdev...@gmail.com> wrote: > t <- "TheWeatherIsVeryNice" > > How do I extract the upper case letters? - TWIVN > > Thanks! > > -- > View this message in context: > http://r.789695.n4.nabble.com/Extract-upper-case-letters-tp4634664.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.