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treestats (version 1.70.5)

j_one: J^1 index.

Description

The J^1 index calculates the Shannon Entropy of a tree, where at each node with two children, the Shannon Entropy is the sum of p_i log_2(p_i) over the two children i, and p_i is L / (L + R), where L and R represent the number of tips connected to the two daughter branches.

Usage

j_one(input_obj)

Value

j^1 index

Arguments

input_obj

phylo object or ltable

References

Jeanne Lemant, Cécile Le Sueur, Veselin Manojlović, Robert Noble, Robust, Universal Tree Balance Indices, Systematic Biology, Volume 71, Issue 5, September 2022, Pages 1210–1224, https://doi.org/10.1093/sysbio/syac027