Hi Matthew.
I don't doubt that other members of the list have better suggestions,
but it is possible to add a tip in all possible places using bind.tree()
in ape.
For instance, starting with a random unrooted tree with, say, 4 taxa:
tree-rtree(n=4,rooted=FALSE,br=rep(1,5))
# create a 5th
Of course, we could generalize my preceding suggestion with the
following function:
add.everywhere-function(tree,tip.name){
tree-unroot(tree)
tree$edge.length-rep(1,nrow(tree$edge))
new.tip-list(edge=matrix(c(2,1),1,2),tip.label=tip.name,
edge.length=1,Nnode=1)
