RenumberTips(tree, tipOrder) sorts the tips of a phylogenetic tree
such that the indices in tree$edge[, 2] correspond to the order of
tips given in tipOrder.
Usage
RenumberTips(tree, tipOrder)
# S3 method for phylo
RenumberTips(tree, tipOrder)
# S3 method for multiPhylo
RenumberTips(tree, tipOrder)