imbalance_steps

Calculates the number of moves required to transform the focal
tree into a fully imbalanced (caterpillar) tree. Higher value indicates a
more balanced tree.

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

imbalance_steps function

<dl><dt>input_obj</dt>
<dd>phylo object or ltable</dd>
<dt>normalization</dt>
<dd>if true, the number of steps taken is normalized by tree
size, by dividing by the maximum number of moves required to move from a
fully balanced to a fully imbalanced tree, which is \(N - log2(N) - 1\),
where N is the number of extant tips.</dd></dl>

Arguments

Imbalance steps index — imbalance_steps

<dl>

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


<dt>normalization</dt>
<dd>if true, the number of steps taken is normalized by tree
size, by dividing by the maximum number of moves required to move from a
fully balanced to a fully imbalanced tree, which is \(N - log2(N) - 1\),
where N is the number of extant tips.</dd>

</dl>

imbalance_steps: Imbalance steps index

Description

Usage

Value

Arguments