[R] Counting number of rows with two criteria in dataframe

Ryan Utz utz.ryan at gmail.com
Tue Jan 25 20:25:45 CET 2011


An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20110125/d37a2786/attachment.pl>


More information about the R-help mailing list