is.binary.tree

From ape v3.2 by Emmanuel Paradis

Test for Binary Tree

This function tests whether a phylogenetic tree is binary.

Keywords: logic

Usage

is.binary.tree(phy)

Arguments

phy: an object of class "phylo".

Details

The test differs slightly whether the tree is rooted or not. An urooted tree is considered binary if all its nodes are of degree three (i.e., three edges connect to each node). A rooted tree is considered binary if all nodes (including the root node) have exactly two descendant nodes, so that they are of degree three expect the root which is of degree 2.

Value

is.binary.tree returns TRUE if tree is a fully binary phylogenetic tree, otherwise it returns FALSE.

Examples

data("hivtree.newick") # example tree in NH format
tree.hiv <- read.tree(text = hivtree.newick)
is.binary.tree(tree.hiv)
plot(tree.hiv)

Documentation reproduced from package ape, version 3.2, License: GPL (>= 2)

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