stairs2 {treestats}

Stairs2 index

Description

Calculates the stairs2 measure, from the phyloTop package. The stairs2 reflects the imbalance at each node, where it represents the average across measure at each node, the measure being min(l, r) / max(l, r), where l and r reflect the number of tips connected at the left (l) and right (r) daughter.

Usage

stairs2(input_obj)

Arguments

input_obj

phylo object or ltable

Value

number of stairs

References

Norström, Melissa M., et al. "Phylotempo: a set of r scripts for assessing and visualizing temporal clustering in genealogies inferred from serially sampled viral sequences." Evolutionary Bioinformatics 8 (2012): EBO-S9738.