R: Is Group Monophyletic

is.monophyletic {ape} | R Documentation

## Is Group Monophyletic

### Description

This function tests whether a list of tip labels is monophyletic on a given tree.

### Usage

    is.monophyletic(phy, tips, reroot = !is.rooted(phy), plot = FALSE, ...)

### Arguments

`phy` | a phylogenetic tree description of class `"phylo"`.
`tips` | a vector of mode numeric or character specifying the tips to be tested.
`reroot` | a logical. If `FALSE`, then the input tree is not unrooted before the test.
`plot` | a logical. If `TRUE`, then the tree is plotted with the specified group `tips` highlighted.
`...` | further arguments passed to `plot`.

### Details

If `phy` is rooted, the test is done on the rooted tree, otherwise the tree is first unrooted, then arbitrarily rerooted, in order to be independent on the current position of the root. That is, the test asks if `tips` could be monophyletic given any favourably rooting of `phy`.

If `phy` is unrooted the test is done on an unrooted tree, unless `reroot = FALSE` is specified.

If tip labels in the list `tips` are given as characters, they need to be spelled as in the object `phy`.

### Value

`TRUE` or `FALSE`.

### Author(s)

Johan Nylander jnylander@users.sourceforge.net

### See Also

`which.edge`, `drop.tip`, `mrca`.

### Examples

        ## Test one monophyletic and one paraphyletic group on the bird.orders tree
        ## Not run: data("bird.orders")
        ## Not run: is.monophyletic(phy = bird.orders, tips = c("Ciconiiformes", "Gruiformes"))
        ## Not run: is.monophyletic(bird.orders, c("Passeriformes", "Ciconiiformes", "Gruiformes"))

[Package ape version 5.0 Index]