Re: [R] MANOVA: how do I read off within and between Sum-of-Squares info from the manova result?

From: hadley wickham <h.wickham_at_gmail.com>
Date: Mon 20 Feb 2006 - 09:34:17 EST

> However, I have yet to encounter such a case. If I had time to pursue
> a modeling effort beyond simple univeriate analyses, I thing I would
> move to "structural equation modeling" (package sem) or "partial least
> squares". "RSiteSearch" can lead you to R capabilities for these. (See
> also "http://finzi.psych.upenn.edu/R/Rhelp02a/archive/29119.html").

Another option is to look at your data in their original high dimensional space, eg., with the grand tour in GGobi (http://www.ggobi.org, http://ggobi.org/demos/tour.html). MANOVA tests the hypothesis that the means are different (assuming multivariate normality and a common variance-covariance matrix). By looking at your data you can investigate more interesting hypotheses - are the groups overlapping? is there a linear or non-linear separation between the groups? are the responses highly correlated?

Hadley



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