search for: mammaldata

...tive analysis of mammal brain and body size data. I'm following Charlie Nunn and Natalie Cooper's instructions for "Running PGLS in R using caper". I run into the following error when I create my comparative dataset, combining my phylogenetic tree (mammaltree) and taxon measures (mammaldata): "Error in phy$node.label[which(newNb > 0) - Ntip] : only 0's may be mixed with negative subscripts" My full script is provided at the bottom. I have looked at the caper manual by David Orme to understand how comparative.data() constructs the dataset, but still cannot interpret...