From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>

Date: Thu 10 Mar 2005 - 20:33:32 EST

Date: Thu 10 Mar 2005 - 20:33:32 EST

Prof Brian Ripley <ripley@stats.ox.ac.uk> writes:

> On Wed, 9 Mar 2005, Darren Weber wrote:

*>
**> > How do we specify a contrast interaction matrix for an ANOVA model?
**> >
**> > We have a two-factor, repeated measures design, with
**>
**> Where does `repeated measures' come into this? You appear to have
**> repeated a 2x2 experiment in each of 8 blocks (subjects). Such a
**> design is usually analysed with fixed effects. (Perhaps you averaged
**> over repeats in the first few lines of your code?)
*

Actually, that's not "usual" in SAS (and not SPSS either, I believe) in things like

proc glm;

model y1-y4= ; repeated row 2 col 2;

[Not that SAS/SPSS is the Gospel, but they do tend to set the terminology in these matters.]

With more than two levels, you get the additional complications of sphericity testing and GG/HF epsilons and all that.

-- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.htmlReceived on Thu Mar 10 20:48:02 2005

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