Prof Brian Ripley <[EMAIL PROTECTED]> 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 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
