R: Add an arrow pointing to a tip or node on the tree

add.arrow {phytools}

R Documentation

Add an arrow pointing to a tip or node on the tree

Description

This function adds an arrow to a plotted tree.

Usage

add.arrow(tree=NULL, tip, ...)

Arguments

`tree`	an object of class `"phylo"`, `"contMap"`, or `"densityMap"`. If not supplied, the function will obtain the last plotted phylogeny from the environmental variable `last_plot.phylo`.
`tip`	label of tip or tip or node number. If `tree=NULL` then the tip or node number must be supplied.
`...`	optional arguments to control the shape and size of the arrow including: its length (`arrl`) in the units of the plot; the length of the arrowhead (`hedl`); the total angle between the wings in the arrowhead (`angle`); the line width for the plotted lines (`lwd`); the offset from the tip or end of tip label, in character widths (`offset`); and the color (`col`).

Details

This function presently works for radial (type="fan") and right facing square phylograms (type="phylogram"). Trees can be plotted using phytools function plotTree, plotSimmap, contMap, densityMap, and ape method plot.phylo.

Author(s)

Liam Revell liam.revell@umb.edu

References

Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.