I index value for a single topology.

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Description

This function assigns the same weight to sister clades (see Van-Wright et al., 1981). The input tree is reordered in post order.

Usage

1

Arguments

tree

is a single tree with n terminals, an ape phylo object.

Value

Returns a vector with weights.

Author(s)

Miranda-Esquivel Daniel R.

Examples

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 library(jrich)
 data(tree)
 plot(tree)
 indexi               <- IndexI(tree)
 newTree              <- tree
 newTree$tip.label    <- indexi
 plot(newTree)