When I put in mode=mode(COUNTS) I get the value "numeric" as an answer. I think it's giving me the data type not the mode. -- View this message in context: http://r.789695.n4.nabble.com/Can-package-plyr-also-calculate-the-mode-tp4663235p4663301.html Sent from the R help mailing list archive at Nabble.com.