phytools (version 0.2-40)

add.random: Add tips at random to the tree

Description

This function adds new tips at random to a tree with branch lengths. If no edge lengths are provided, and the tree is ultrametric, then edge lengths are assigned to keep the tree ultrametric. The probability that at new tip is added along any branch is directly proportional to the length of the branch.

Usage

add.random(tree, n=NULL, tips=NULL, edge.length=NULL, order=c("random","input"))

Arguments

tree

an object of class "phylo".

n

a number of tips to add to the tree. If NULL, will use length(tips).

tips

a set of tip names for the added tips. If NULL, will name as paste("t",length(tree$tip)+1:n,sep="").

edge.length

terminal edge length for the added tips. If NULL, and is.ultrametric(tree)==TRUE, then edge lengths will be assigned to keep the tree ultrametric. Note that if edge lengths are assigned and n>1, then the asssigned te

order

addition order for the new tips.

Value

• an object of class "phylo".

Details

Note that sometimes the resultant tree plotted with plot.phylo or plotSimmap may display with branches crossing. If so, the tree can be 'untangled' using untangle.

See Also

allFurcTrees, add.everywhere