Dear all, I'm trying to use phylo.pca function from phytools for the first time. I'm using an ultrametric tree with 167 tips and all branch lengths transformed to 1. I lunched the pPCA like this: pPCA<-phyl.pca(tree,data,method = "lambda") For some reason it takes for ever and never reaches the end of the process. I tried with method="BM" and the process runs normally. Has this happened to anyone here? How can I go around this? Thanks in advance, S?rgio. -- Institut des Sciences de l'Evolution UMR5554, CNRS, IRD, EPHE Universit? de Montpellier Place Eug?ne Bataillon 34095 Montpellier Cedex 05 France Email: sergio.ferreira-cardoso at umontpellier.fr Tel: +33 (4 ) 67 14 46 52 [[alternative HTML version deleted]]