The total cophenetic index is the sum of the depth of the last
common ancestor of all pairs of leaves.
Usage
tot_coph(phy, normalization = "none")
Arguments
- phy
phylo object or ltable
- normalization
"none" or "yule", when "yule" is chosen, the statistic
is divided by the Yule expectation
Value
Total cophenetic index
References
A. Mir, F. Rosselló, and L. Rotger. A new balance index for
phylogenetic trees. Mathematical Bio-sciences, 241(1):125-136, 2013.
doi: 10.1016/j.mbs.2012.10.005.