Dear all, Glad to be a part in this group.
I am SU from Insubria Univeristy of Italy now, at present, I am trying to use GMM to analyze the squirrel mandibular morph to distinguish three geographic populations (to test how similar they are), at two levels, i.e. Ind and FA. When I want to investigate if they were similar allometry pattern using MANCOVA, I got a problem, the results of MANCOVA （both results by SPSS and TpsRegr, and the shape data were superimposed as a subset separately）showed extremely significant, but from the regression plots and their slopes values( were 0.27, 0.31 and 0.34 respectively, from fitting of regression scores and Log CS ), it seemed similar slopes and easy to centered, so, my puzzles are: 1) Should I believe in these results? did it really mean they can't be forced to parallel slopes? 2) If yes, does it mean that I can't make the regression for 3 populations together in MorphoJ ( including with and without pooling within group) , i.e. I have to make the allometry-related regression analysis in separate populations (superimposed separately) in the next steps? 3) When I was using TpsRegr, I imported the NTS file got from TpsDig, but it contained all observations of pictures, not individuals, so how can I use TpsRegr with averaged individuals (procrustes coordinates and Log CS values) ? what's the differences between them? Sorry, maybe too many questions. Everyone who can give me some suggestions will be grateful. Thanks. Best Regards, SU -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
