support values

mPTP prints an Average Support Value (ASV) for each chain. This is useful to assess the congruence of support values with the ML delimitation. Assume we have obtained the ML delimitation below (left tree) and using MCMC we obtain the support values for each node u shown in the right tree. Note that, the symbol S on the ML tree nodes indicuates that the particular node belongs to the between-species splitting process, while C indicates the node is part of the within-species splitting process.

We compute the ASV using the following formula:

where

The resulting ASV for our particular example is

indicating that there is a 86.4% congruence between the support values and the point-estimate.