[R-sig-phylo] Comparing slopes from regressions and PIC regressions

Dear all I am currently analyzing a community dataset of two continuous traits – survival and disease resistance. I ran two regressions: (1) considering each species independent data points, and (2) phylogenetic independent contrasts. Both regressions were significant. Blomberg’s K also

Re: [R-sig-phylo] Comparing slopes from regressions and PIC regressions

Long story short, you don't want to think about it in those terms. Cheers, Ted Theodore Garland, Jr. Professor Department of Biology University of California, Riverside Riverside, CA 92521 Office Phone: (951) 827-3524 Wet Lab Phone: (951) 827-5724 Dry Lab Phone: (951) 827-4026 Home Phone:

Re: [R-sig-phylo] Comparing slopes from regressions and PIC regressions

VERY synthetically The two r-squared are NOT comparable. Taking in to account phylogeny is useful just to partial out data non independence due to shared ancestry, and to perform better tests of significance but the r-sq could be higher or smaller just because of chance. Maybe someone can

Re: [R-sig-phylo] randomizing clades within a node

Hi Juan, Juan Antonio Balbuena wrote on 13/01/2012 21:57: Hello I would very much appreciate if someone can help me with this one. I wish to compare two additive trees that are identical for some but not all the clades. So I use rtree of the ape package with, say, 10 tips to generate tree