----- Forwarded message from Collin VanBuren <[email protected]>
-----
Date: Mon, 4 Feb 2013 19:59:46 -0500
From: Collin VanBuren <[email protected]>
Reply-To: Collin VanBuren <[email protected]>
Subject: Bootstrapping with Semi-landmarks
To: "[email protected]" <[email protected]>
Hello all,
I am trying to determine if there are significant differences between groups
(of unequal sample sizes) using an outline analysis with sliding
semi-landmarks. Two of these groups are my 'known' groups, and I'm essentially
trying to determine to which of the 'known' groups the other five groups most
likely belong (i.e., they are unknowns). According to what I'm reading, the
only (?) way to do this is to bootstrap the partial Procrustes distances and
then use a Goodall's F-test to test for significant differences. This method
avoids the issues semi-landmarks have with degrees of freedom, and it is my
understanding that I cannot run typical statistical analyses on semi-landmark
datasets because of these issues.
However, I am having issues finding a program with which to run this analysis.
In IMP, it seems a maximum of four groups are allowed, but I have seven total
(the other issue is that it doesn't seem to be letting me open files, but I'm
still playing around with that). It doesn't appear that MorphoJ or any of the R
packages I've looked at (mostly geomorph and shapes) work well with
semi-landmarks, at least not for what I'm looking to do. Any advice on a way I
could perform this analysis or an alternative option?
Thank you in advance for your help!
Collin
----- End forwarded message -----
