IL number

Source: R/ILnumber.R

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

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

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)
#> [1] 2
## and the normalised IL number:
ILnumber(tree, normalise=TRUE)
#> [1] 0.25