This function generates trees with regular shapes.
Usage
stree(n, type = "star", tip.label = NULL)
Value
An object of class "phylo".
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.
Author
Emmanuel Paradis
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.