[R] Manova in R vs. SAS

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Fri Nov 9 09:03:44 CET 2001

Bill Kristan <wbkiii at citrus.ucr.edu> writes:

> While I was helping a SAS-using friend with an analysis I noticed some 
> differences in the multivariate test statistics, approximate F statistics, 
> and p-values in the manova function using R and proc GLM using SAS. The 
> univariate coefficients are identical. Is there a reason to expect R and SAS 
> to give different results?

Could you expand on wherein the difference lies?

I don't think there is more than one definition of Wilks' Lambda, but
are they testing the same hypothesis?

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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