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2008 Apr 14
1
Formula with no intercept
...with two levels (male and female), and other is Time with four levels (T1, T2, T3 and T4). And for the convenience of post-hoc testing I wanted to consider a model with no intercept for factor Time, so I tried formula Group*(Time-1) However this seems to give me the following terms in the model GroupMale, GroupFemale, TimeT2, TimeT3, TimeT4, GroupMale:TimeT2, GroupMale:TimeT3, GroupMale:TimeT4, GroupFemale:TimeT2, GroupFemale:TimeT3, GroupFemale:TimeT4 which is not exactly what I wanted. Also it seems (Group-1)*Time and (Group-1)*(Time-1) also give me exactly the same set of terms as Group*(Time-...