stairs: Stairs

Description

Calculates the staircase-ness measure.

Usage

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stairs(tree)

Arguments

tree

a tree of class phylo or phylo4. The tree should be binary and rooted; if not it will be coerced into a binary rooted tree using multi2di, if possible.

Value

Two numbers corresponding to the two staircase-ness measures for a tree. Defined in Norstrom et al., Evolutionary Bioinformatics online, 8:261 (2012) doi: 10.4137/EBO.S9738, these are two related measures:

Author(s)

Michael Boyd mboyd855@gmail.com

Michelle Kendall michelle.louise.kendall@gmail.com

Examples

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## Find the staircase-ness measures in a random tree with 20 tips:
stairs(rtree(20))
 

Questions? Problems? Suggestions? or email at ian@mutexlabs.com.

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