TreeTools (version 0.1.3)

NPartitionPairs: Distributions of tips consistent with a partition pair

Description

Number of terminal arrangements matching a specified configuration of two partitions.

Usage

NPartitionPairs(configuration)

Arguments

configuration

Integer vector of length four specifying the number of terminals that occur in both (1) splits A1 and A2; (2) splits A1 and B2; (3) splits B1 and A2; (4) splits B1 and B2.

Value

The number of ways to distribute sum(configuration) taxa according to the specified pattern.

Details

Consider partitions that divide eight terminals, labelled A to H.

Bipartition 1: ABCD:EFGH A1 = ABCD B1 = EFGH

This can be represented by an association matrix:

A2 B2
A1 AB C

The cells in this matrix contain 2, 1, 1 and 3 terminals respectively; this four-element vector (c(2, 1, 1, 3)) is the configuration implied by this pair of bipartition splits.

Examples

Run this code
# NOT RUN {
NPartitionPairs(c(2, 1, 1, 3))

# }

Run the code above in your browser using DataCamp Workspace