ILnumber: IL number
In phyloTop: Calculating Topological Properties of Phylogenies

ILnumber

R Documentation

IL number

Description

Computes the number of internal nodes with a single tip child.

Usage

ILnumber(tree, normalise = FALSE)

Arguments

`tree`	a tree of class `phylo` or `phylo4`. The tree should be binary and rooted; if not it will be coerced into a binary rooted tree using multi2di, if possible.
`normalise`	option to normalise the result, default is `FALSE`

Value

The integer number of internal nodes with a single tip child.

Author(s)

Michael Boyd mboyd855@gmail.com

Michelle Kendall michelle.louise.kendall@gmail.com

Examples

## Find the IL number of a random tree with 10 tips:
tree <- rtree(10)
plot(tree)
ILnumber(tree)
## and the normalised IL number:
ILnumber(tree, normalise=TRUE)

phyloTop documentation built on Aug. 27, 2025, 9:08 a.m.