Hello all
I am trying to calculate sigma2 values for a clade, using 4 PCA axes as my
characters.
I first wanted to figure out if my data better fit a BM model or an OU1
model of evolution. So I compared AICc values using the fitContinuous
function in Geiger.
I found the following:
BM
Hi Pascal.
The first clue is the the length of your tree is exactly the same as the
ratio of your two sets of rates. This suggests that OUCH is first
rescaling the tree to unit length. Let's see if this explains your
results, just working with your first character:
