Balance metric that uses the Shannon-Wiener statistic of
information content. The b2 measure is given by the sum over the depths of
all tips, divided by 2^depth: sum Ni / 2^Ni.
Although also defined on non-binary trees, the treestats package only
provides code for binary trees.

Collection of phylogenetic tree statistics,
collected throughout the literature. All functions have been
written to maximize computation speed. The package includes
umbrella functions to calculate all statistics, all balance
associated statistics, or all branching time related statistics.
Furthermore, the 'treestats' package supports summary statistic
calculations on Ltables, provides speed-improved coding of
branching times, Ltable conversion and includes algorithms to
create intermediately balanced trees. Full description can be
found in Janzen (2024) <doi:10.1016/j.ympev.2024.108168>.

Thijs Janzen

treestats

Phylogenetic Tree Statistics

b2 function

<dl><dt>phy</dt>
<dd>phylo object or ltable</dd>
<dt>normalization</dt>
<dd>"none" or "yule", when "yule" is chosen, the statistic
is divided by the Yule expectation, following from theorem 3.7 in Bienvenu
2020.</dd></dl>

Arguments

B2 metric — b2

<dl>

<dt>phy</dt>
<dd>phylo object or ltable</dd>


<dt>normalization</dt>
<dd>"none" or "yule", when "yule" is chosen, the statistic
is divided by the Yule expectation, following from theorem 3.7 in Bienvenu
2020.</dd>

</dl>

b2: B2 metric

Description

Usage

Value

Arguments

References