B2: B2

In bdearlove/treeImbalance: Imbalance metrics for time-sampled phylogenetic trees.

Description

This calculates B2 for a phylogenetic tree. If we consider the topological distance, M_i, between each leaf i and the root, then

B_2 = ∑_{i \in \mathcal{L}} {\frac{M_i}{2^{M_i}} }.

Usage

B2(tree)

Arguments

tree	A tree of class phylo or treeshape.

Value

An object of class numeric.

References

• Pompei S, Loreto V, Tria F (2012) Phylogenetic Properties of RNA Viruses. PLoS ONE 7(9): e44849. doi:10.1371/journal.pone.0044849

• Shao K, Sokal R (1990) Tree balance. Systematic Zooology 39: 266-276

Examples

N=30
tree<-rtreeshape(1,tip.number=N,model="pda")[[1]]
B2(tree)

bdearlove/treeImbalance documentation built on May 12, 2019, 3:39 a.m.