stree {ape}

Generates Systematic Regular Trees

Description

This function generates trees with regular shapes.

Usage

stree(n, type = "star", tip.label = NULL)

Arguments

n

an integer giving the number of tips in the tree.

type

a character string specifying the type of tree to generate; four choices are possible: "star", "balanced", "left", "right", or any unambiguous abbreviation of these.

tip.label

a character vector giving the tip labels; if not specified, the tips "t1", "t2", ..., are given.

Details

The types of trees generated are:

• “star”: a star (or comb) tree with a single internal node.

• “balanced”: a fully balanced dichotomous rooted tree; n must be a power of 2 (2, 4, 8, ...).

• “left”: a fully unbalanced rooted tree where the largest clade is on the left-hand side when the tree is plotted upwards.

• “right”: same than above but in the other direction.

Value

An object of class "phylo".

Author(s)

Emmanuel Paradis

See Also

compute.brlen, rtree

Examples

layout(matrix(1:4, 2, 2))
plot(stree(100))
plot(stree(128, "balanced"))
plot(stree(100, "left"))
plot(stree(100, "right"))