extract.parsimonyCost
takes an object of class "parsimonyCost
",
result of function parsimonyCost
, and computes the minimum cost
at the given node.
an object of class "parsimonyCost
", result of function
parsimonyCost
.
the root node of the subtree. By default, the root of the tree.
unused
An integer giving the minimum cost of the subtree.