Thank you Marc and David for your suggestions. I think Marc's is going to work nicely for what I need but I'll also try David's.
Many thanks both Fiona -- View this message in context: http://r.789695.n4.nabble.com/for-in-steps-tp3946248p3947950.html Sent from the R help mailing list archive at Nabble.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.
