Cute! I don't think your proposed strategy is all that complicated, but see the gsubfn package for a one-liner. In particular, check out
http://code.google.com/p/gsubfn/ where there is an example for your almost exact task. -- Bert On Thu, May 26, 2011 at 3:05 PM, Dennis Fisher <fis...@plessthan.com> wrote: > Colleagues > > Assume that I have a vector containing some text strings, some of which > contain a particular character. I could like to apply "toupper" to the text > before the character. For example (in this case, "|" is the particular > character): > > ORIGINAL: > TEXT <- c("aaaa", "bbb|cc", "|ddd") > > AFTER APPLICATION OF toupper: > TEXT <- c("AAAA", "BBB|cc", "|dddd") > > I could loop through each element, strsplit at the character, apply toupper > to the first component, then paste each element together. But, I hope that > there is a simpler means to accomplish this. > > Thanks in advance. > > Dennis > > > Dennis Fisher MD > P < (The "P Less Than" Company) > Phone: 1-866-PLessThan (1-866-753-7784) > Fax: 1-866-PLessThan (1-866-753-7784) > www.PLessThan.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. > -- "Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics 467-7374 http://devo.gene.com/groups/devo/depts/ncb/home.shtml ______________________________________________ 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.
