Sorry for the question, but I really cannot find the right search terms to find an answer..
I have a data frame with strings in some of the columns. I want to know all the rows where the strings in both columns are equal. How do I do this? Thanks, Bernd [[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.