On Fri, Aug 20, 2010 at 9:59 AM, Cecilia Carmo <cecilia.ca...@ua.pt> wrote: > The last one worked! The other one, not. > Thank you very much! > > Another question about merge(): sometimes I'm merging two dataframes and the > merged dataframe has much more rows than the two merged? I think this should > not happen,does it? >
That is normal behavior. If there are m rows of with a key in x and n rows of that key in y then there will be mn rows generated. Every such row in x will be matched to every such row in y. ______________________________________________ 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.
