Re: [R-sig-phylo] If my trait X cannot be regressed by body size, how can I rescue residuals corrected by the phylogeny and SE?

I agree with the others, if your goal is to control for size/mass then I don’t see how the “residuals” from an intercept only model will be useful.  If the relationship between your trait and size is almost isometric, ratios are the simplest way to go. For ANOVAs, I will simply use size as a co

Re: [R-sig-phylo] If my trait X cannot be regressed by body size, how can I rescue residuals corrected by the phylogeny and SE?

Aloha Gabriel, Joe and Graham have given you very good advice. I just wanted to chime in to reinforce the point that you should not apply a "phylogenetic correction" twice on the same set of data! If youʻve removed the expected covariance, it is good for an ordinary ANOVA. If you do a phylogenetic