Levels number of a factor object
Laurent Houdusse <l.houdusse at cerep.fr> writes:
Hi all!
How to retrieve the levels number of a factor object?
See this code:
groups<-gl(4,10)
I want to retrieve the number of levels (4) of my object "groups"
I tried groups.levels but this don't work
Thanks
Do you mean just length(levels(groups)) ?
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907