is.binary.tree {ape} | R Documentation |
This function tests whether a phylogenetic tree is binary, i.e. whether every node (including the root node) has exactly two descendant nodes. In this case the number of edges in the tree equals 2 n - 2 where n is the number of taxa (tips) in the tree.
is.binary.tree(phy)
phy |
phylogenetic tree (i.e. an object of class "phylo" ). |
is.binary.tree
returns TRUE
if tree
is a fully binary phylogenetic tree, otherwise it returns FALSE
.
Korbinian Strimmer (http://www.stat.uni-muenchen.de/~strimmer/)
library(ape) data("hivtree.newick") # example tree in NH format tree.hiv <- read.tree(text = hivtree.newick) # load tree is.binary.tree(tree.hiv) plot(tree.hiv) unlink("hivtree.phy") # delete the file "hivtree.phy"