From ape v2.6-3
0th

Percentile

This function reorganizes the internal structure of the tree to get the ladderized effect when plotted.

Keywords
manip
Usage
ladderize(phy, right = TRUE)
Arguments
phy
an object of class "phylo".
right
a logical specifying whether the smallest clade is on the right-hand side (when the tree is plotted upwards), or the opposite (if FALSE).

plot.phylo, reorder.phylo

Aliases
tr <- rcoal(50)
layout(matrix(1, 1))