I am making the assumption that all the columns are character and not factors:
for (i in c("A", "B", "C", "D", "E")){ yourdf[[i]] <- ifelse(yourdf[[i]] == 'x' , 'y' , ifelse(yourdf[[i]] == 'a' , 'b' , yourdf[[i]] ) ) } On Mon, Aug 27, 2012 at 4:19 PM, Sapana Lohani <lohani.sap...@ymail.com> wrote: > I have 5 (A,B,C,D,E) columns in my dataframe. I want to replace all "x" with > "y" and all "a" with "b" within these 5 columns. Can I do it in one step? > > Thanks > [[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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ 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.