ew_colless

The equal weights Colless index is calculated as the sum of
\(abs(L - R) / (L + R - 2)\) over all nodes where L + R &gt; 2,
where L (or R) is the number of extant tips associated with the L (or R)
daughter branch at that node. Maximal imbalance is associated with a value
of 1.0. The ew_colless index is not sensitive to tree size.

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

ew_colless function

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

Arguments

Equal weights Colless index of (im)balance. — ew_colless

<dl>

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

</dl>

ew_colless: Equal weights Colless index of (im)balance.

Description

Usage

Value

Arguments

References

Examples