LeafLabelInterchange() exchanges the position of leaves within a tree.

LeafLabelInterchange(tree, n = 2L)



A tree of class phylo.


Integer specifying number of leaves whose positions should be exchanged.


LeafLabelInterchange() returns a tree of class phylo on which the position of n leaves have been exchanged. The tree's internal topology will not change.


Modifies a tree by switching the positions of n leaves. To avoid later swaps undoing earlier exchanges, all n leaves are guaranteed to change position. Note, however, that no attempt is made to avoid swapping equivalent leaves, for example, a pair that are each others' closest relatives. As such, the relationships within a tree are not guaranteed to be changed.


tree <- PectinateTree(8)
plot(LeafLabelInterchange(tree, 3L))