[R] SE estimates for treatment groups from nlme

Christian Ritz ritz at kvl.dk
Mon Apr 10 19:51:46 CEST 2006

Hi Katie,

maybe the easiest solution is to create a new factor that corresponds to
the combinations of the three factors A, B and C. A quick and dirty way
to create such a factor is:

ABC <- factor(paste(A, "x", B, "x", C, sep = ""))

and then fit the model using the variable ABC instead of A*B*C.


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