-------- Original Message --------
Subject: MorphoJ visualisations
Date: Tue, 16 Feb 2010 11:48:01 -0500
From: Tim tkint <[email protected]>
To: <[email protected]>
Dear all,
I am doing a geometric morphometric study on sexual dimorphism in
cichlids. I like using MorphoJ, but I am a little confused about the
visualisations. First of all, what exactly does the scale factor mean?
Is this value linked to the coordinates of the specimens along the axes:
(e.g. scale factor 10 corresponds to shape at score 10 on axis) or is it
a multiplication of the total shape change along an axis?
And what is the ‘secret’ behind the visualisation of the shape changes
along CVA-axes? (Several publications have mentioned that CVA-results
are difficult to visualize directly because a CVA re-scales axes using
within-group variation.)
Kind regards,
Tim.
___________________
Tim tkint
Ghent University
Evolutionary Morphology of Vertebrates
K.L. Ledeganckstraat 35, B-9000 Gent, Belgium
tel: +32 9 264 52 33
E-mail: [email protected] <mailto:[email protected]>
http://www.fun-morph.ugent.be/
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