Try this one: > gsub("^(plif)([a-z]*)", "\\1ONE", words) [1] "plifONE" "plafboum" "ploufbang" "plifONE"
-Christos > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of GOUACHE David > Sent: Wednesday, March 12, 2008 12:15 PM > To: [EMAIL PROTECTED] > Subject: [R] regular expressions > > Hello all, > > Still fighting with regular expressions and such, I am again stuck: > > Suppose I have a vector of character chains. In this vector, > I wish to identify which character chains start with a given > pattern, and then replace everything that comes after said pattern. > > Here is a quick example : > > words<-c("plifboum","plafboum","ploufbang","plifplaf") > > I want to end up with something like this: > > "plifONE","plafboum","ploufbang","plifONE" > > All I can produce so far is this : > gsub("\\bplif.","ONE",words,perl=T) > > which turns out : > "ONEboum","plafboum","ploufbang","ONEplaf" > > Thanks in advance for your help. > > David Gouache > > Arvalis - Institut du Végétal > > Station de La Minière > > 78280 Guyancourt > > Tel: 01.30.12.96.22 / Port: 06.86.08.94.32 > > > > > ______________________________________________ > 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.