sackin

The Sackin index is calculated as the sum of ancestors for each
of the tips. Higher values indicate higher imbalance. Two normalizations
are available, where a correction is made for tree size, under either a
Yule expectation, or a pda expectation.

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

sackin function

<dl><dt>phy</dt>
<dd>phylogeny or ltable</dd>
<dt>normalization</dt>
<dd>normalization, either 'none' (default), "yule" or "pda".</dd></dl>

Arguments

Sackin index of (im)balance. — sackin

<dl>

<dt>phy</dt>
<dd>phylogeny or ltable</dd>


<dt>normalization</dt>
<dd>normalization, either 'none' (default), "yule" or "pda".</dd>

</dl>

sackin: Sackin index of (im)balance.

Description

Usage

Value

Arguments

References

Examples