Slide method and RWs

[morphmet]

-------- Original Message --------
Subject:        Slide method and RWs
Date:   Tue, 8 Sep 2009 07:29:48 -0700 (PDT)
From:   Teresa Militão <tetecaloiri...@gmail.com>
To:     morphmet@morphometrics.org



Hello, everybody!



I'm using the geometric morphometric analysis to know if there are any
differences in beak's shape between two species. For determine the
beak's shape I’m using 10 landmarks and 3 semilandmarks. However I have
some doubts that I was wondering if you can help me:



1.      I'm using the TpsRelw to slide the semilandmarks, however I
don't know which slide method is more appropriated to do it?



2.      After sliding the semilandmarks using the Chord - min d2 I had
23 RWs. Theoretically if I have 3 semilandmarks, the last 3 RW should
explain 0% of the variance, right? However I have one (of theses 3 last
RWs) that explain 0,01%. Is it normal? Should I use this RW in further
analysis?



Thank you very much.





Teresa


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