collapseUnsupportedEdges: Collapse Unsupported Edges/Branches in a Phylogeny

In ips: Interfaces to Phylogenetic Software in R

Collapse Unsupported Edges/Branches in a Phylogeny

Description

Given a set of node support values (e.g., bootstrap proportions, posterior probabilities) and a certain threshold, all edges receiving less support than the threshold will be collapsed.

Usage

collapseUnsupportedEdges(phy, value = "node.label", cutoff)

Arguments

phy	An object of class phylo.
value	A character string giving the name of the list element of the phylo object that contains the support values; default is "node.label".
cutoff	A numeric value giving the threshold below which edges will be collapsed.

Details

Collapsing weekly supported edges can help draw attention to those parts of a phylogeny that are really supported by the underlying data.

Value

An object of class phylo.

Examples

## phylogeny of bark beetles
data(ips.tree)

## non-parametric bootstrap proportions (BP)
ips.tree$node.label

## collapse clades with < 70 BP
tr <- collapseUnsupportedEdges(ips.tree, "node.label", 70)

## show new topology
plot(tr, no.margin = TRUE)

ips documentation built on July 8, 2026, 5:07 p.m.