[R] Can package plyr also calculate the mode?

ramoss ramine.mossadegh at finra.org
Thu Apr 4 20:44:13 CEST 2013

When I run  yy <- ddply(all,"ACTIVIT", summarise, mode=mode(COUNTS))

I get :  ACTIVIT	mode
	XX	numeric
                   ZZ              numeric
      & so on.

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