Hi Karla,
The original simple way to compare two clades, using phylogenetically
independent contrasts, is here. Newer methods may have higher power, but
this method is straightforward.
Garland, Jr., T. 1992. Rate tests for phenotypic evolution using
phylogenetically independent contrasts. The
Hi Karla,
Here is a way to compare nested models in order to assess the significance of
rate differences for a given tree and mapped regimes (in a similar fashion to
what is proposing Liam).
# Here a function to collapse the regimes
mappedTrees <- function(tree, names){
combined <-
