On Thu, Aug 2, 2012 at 4:52 PM, Ayyappa Chaturvedula <ayyapp...@gmail.com> wrote: > Michael, > Thank you for this , it worked. I was thinking "by" is a required argument > in merge function. >
Well, it is "required" in a strict sense, but it has a default value (defaulting to the shared names) so _you_ don't have to specify it. Best, Michael > Regards, > Ayyappa > ______________________________________________ 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.
