Dear All I have a question regarding combining two types of morphological variables into the same analysis. I have a 3D landmark configuration and associated 3D outlines, which are registered in a common reference frame (via GPA). I have generated Procrustes variables from the landmark configuration and Fourier coefficients from the outline data.
A) Does anyone know of a published example where procrustes variables have been analysed WITH Fourier coefficients in the same analysis (e.g. Principal Components Analysis) and B) If not, can anyone think of any reason why these two types of shape variables cannot be analysed simultaneously? I ran a dummy test using both variables at the same time and found that similar patterns between groups were produced with both variable-types, although cross-validated classification of groups (using Discriminant Function Analysis) was best when both Procrustes and Fourier variables were used together. Any further comments or suggestions would be greatly appreciated! Many thanks in advance Noreen [EMAIL PROTECTED] -- Noreen von Cramon-Taubadel Department of Biological Anthropology University of Cambridge The Henry Wellcome building, Fitzwilliam street Cambridge CB2 1QH Phone: +44 1223 764719 [EMAIL PROTECTED] -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
