The problem turned out to be in the categorical encodings (again). I've pushed several commits which now means we have a full factorial anova GLM with Types I, II and III sums of squares.
I've done some reasonably comprehensive tests, and can only see one problem: When presented with an unbalanced design and Type III is requested the Intercept value doesn't agree with SPSS. Now we're calculating the Intercept sums of squares simply as (mean^2 * N). SPSS is clearly doing something different. Quite what, I don't know. If someone can tell me how to get this final bit of the puzzle solved, I think we'll have made a big step forward. J' -- PGP Public key ID: 1024D/2DE827B3 fingerprint = 8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3 See http://pgp.mit.edu or any PGP keyserver for public key.
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