Thanks Michael I update plyr and it works now.
regards, Christiaan On 16 December 2010 13:40, Michael Bedward <michael.bedw...@gmail.com>wrote: > Hi Christiaan, > > That looks like the join function in the plyr package. > > Michael > > [[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.