[Bioperl-l] branch length score - total length of the spanning subtree

[Daniel Gerlach]

Hello,

I would like to use bioperl to calculate a branch length score for a 
given set of nodes and a tree. I know how to get the total branch length 
by using $tree->total_branch_length, but how could I get the length of 
the subtree spanning some given nodes which are dispersed over the whole 
tree (a subset of nodes from the tree which are not monophyletic)?

Greetings, Daniel