Morphometrics colleagues, Version 3.0.6 of geomorph has now been released and is up on the CRAN repository for download and installation. As with all version updates, changes have been documented in the News file.
Of particular note is the incorporation of a refined residual randomization permutation procedure (RRPP) which is more general than its predecessor. For OLS models, the method is equivalent to the previous version and thus unchanged. However, for GLS models, the refined RRPP procedure is preferable and more widely applicable for statistical designs such as phylogenetic regression, phylogenetic anova, and phylogenetic factorial models. A discussion of the procedure, and of the theory of exchangeable units from which the method is derived, is found in a recent paper in Evolution: Adams and Collyer. 2018. Phylogenetic anova: group-clade aggregation, biological challenges, and a refined permutation procedure. (found at https://onlinelibrary.wiley.com/doi/abs/10.1111/evo.13492 ). Also, for the macroevolutionary biologists in the group, that paper also discusses how group dispersion across the phylogeny can affect statistical and thus biological inferences with respect to covariation patterns with phenotypic traits. Best, Dean (on behalf of the geomorph team: Dean, Mike, and Antigoni) Dr. Dean C. Adams Director of Graduate Education, EEB Program Professor Department of Ecology, Evolution, and Organismal Biology Iowa State University www.public.iastate.edu/~dcadams/<http://www.public.iastate.edu/~dcadams/> phone: 515-294-3834 -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
