Hi,
I'm using the Picante package in R to calculate the Blomberg K. I'm
trying to test for a phylogenetic signal in my data. I'm using a
dataset with the PC score for 21 different species on a tree with
varying branch lengths. I did this using the code here:
Hi Daniel.
I can think of two possibilities:
1) This is an error.
2) Your tree has an extremely unusual shape (for instance, it has many
bifurcations very close to the present day).
On constant rate Yule trees, substituting 1s for the true branch lengths
does not (on average) bias K in any
