Hello everyone, I'm a MSci student new to morphometrics and this group. I'm studying morphological integration in squamate crania and one of the things I'd like to do is an Evolutionary PCA of all my species, accounting for phylogeny and allometry.
I think I do this correctly but in the PCA results the PCs are not ranked by proportion of variance e.g. PC5 has greater % variance that PCs 3 & 4. Is this normal? To conduct the evolutionary PCA I created independant contrasts of all my shape data, regressed centroid size on shape and conducted PCA on the residuals. After this I applied the resultant PC scores to another PCA of my original data. Would anyone kindly confirm if this is the right way to do it? Many thanks, Alex Marshall MSci Student University College London alexander.marshall...@ucl.ac.uk -- 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 morphmet+unsubscr...@morphometrics.org.
