[R] Mauchly and Levene

Peter Dalgaard p.dalgaard at biostat.ku.dk
Tue Jun 27 11:22:57 CEST 2006

Tanja Seifried <cinnamon313 at web.de> writes:

> Hallo!
> I just started working with R to do the statistical analyses for my diploma thesis.
> I got two sets of data. 
> Both contain repeated measures.
> One has only one within-subject factor with four levels.
> The other has one within-subject factor with two levels and one between-factor with two levels.
> I want to compute a Mauchly test for both sets and a Levene test for the second set.
> I couldn't find the LEvene test in R. Is it there?

There's one in the "car" package.
> I found the mauchly.test but I wasn't able to find out how to compute the error of covariance matrix I need as an argument for mauchly.test.
> could anybody help me with the correct input I have to give to Mauchly.test so R will give me a test of sphericity out of my data?

Someone already did. This is the first example on the help page for
mauchly.test. And generating SSD/Variance matrices is on the help page
for SSD.

   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907

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