Hi YN, I use strsplit for this:
x <- ".7_-.3_-.2_.9" > strsplit(x, split = "_") [[1]] [1] ".7" "-.3" "-.2" ".9" > strsplit(x, split = "_")[[1]][3] [1] "-.2" Best, Ista On Mon, May 7, 2012 at 9:54 AM, YN Kim <y2sile...@gmail.com> wrote: > Hi all, > > One of my variables looks like this: > > .7_-.3_-.2_.9 > > And this is a character variable. I made this by combining four different > number like .7, -.3, -.2, and .9 using paste function. > Now, I want to go back to original format from this one combined character > variable. For instance, I want to extract 3rd number, -.2, from this > character. > > I know I can use substr function, but each position is not fixed because > sometimes each number has negative sign. Instead, it would be good if there > is any extracting function which can extract character not by position but > by specific symbol, in my case symbol '_'. Is there any similar function > for doing in R? > > Thanks! > > YN > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
