[R] "/" operator in model formula
p.dalgaard at biostat.ku.dk
Wed Nov 12 17:44:05 CET 2003
Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:
> The difference is between testing and crossing. In a / b the levels
> of b are unrelated for different levels of a, whereas in a*b they are the
> same levels.
"...nesting and crossing", of course.
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
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