Rainer, The are probably lots of ways, I'd use levels(interaction(c("a", "b"), c('x', 'y'), sep=''))
Dave >Hi > >I know there is a function - I have used it before - but I always forget >what it is called... > >I need the combination of two character vectors, i.e: > >x <- c("a", "b") >y <- c("x", "y") > >z <- THEFUNCTION(x, y) > >z == c("ax", "ay", "bx", "by") > >I promise I will write the name of the function on my desk! > >Thanks, > >Rainer [[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.