-------- Original Message --------
Subject: Regression and DFA/CVA in MorphoJ
Date: Wed, 5 Oct 2011 12:36:55 -0400
From: [email protected]
To: [email protected]
Hi,
I find that when I do the following, MorphoJ does not perform DFA or CVA.
I often regress Procrustes coordinates against an independent variable
such as age, and perform a second regression of those residuals (not the
regression scores) against centroid size. MorphoJ will perform PCA on
these new residuals, but it will not compute a DF (though it will, of
course, if the procrustes coordinates are regressed one time against an
independent variable). I've seen this with several different datasets, and
was wondering if anyone might comment on this.
Thanks. Eric.
