cherries {treestats}

Cherry index

Description

Calculate the number of cherries, from the phyloTop package. A cherry is a pair of sister tips.

Usage

cherries(input_obj, normalization = "none")

Arguments

input_obj

phylo object or ltable

normalization

"none", "yule", or "pda", the found number of cherries is divided by the expected number, following McKenzie & Steel 2000.

Value

number of cherries

References

McKenzie, Andy, and Mike Steel. "Distributions of cherries for two models of trees." Mathematical biosciences 164.1 (2000): 81-92.