[R] MANOVA and Extra Sums-of-Squares Tests

[John Fox]

Dear chris33,

You can use the anova() function to compare the two multivariate linear models. Alternatively, the Anova() function in the car package will compute "type II" or "type III" MANOVA tests, which aren't quite what you're asking about.

I hope this helps,
 John

------------------------------------------------
John Fox
Sen. William McMaster Prof. of Social Statistics
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
http://socserv.mcmaster.ca/jfox/

On Tue, 13 Mar 2012 12:31:25 -0700 (PDT)
 chris33 <malachowski at gmail.com> wrote:
> I would like to conduct an extra sum-of -squares test that compares a full
> MANOVA model (with all 1st order interactions) to a reduced model (no
> interactions) to determine if I can drop all interactions at the same time. 
> This is analagous to an extra sum-of-squares F-test in ANOVA, but instead
> using MANOVA.  Is there a command in R that does this?  If not, is there a
> command that calculates residual sum-of-squares and cross-product matrices? 
> Thanks.
> 
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