phi {untb}R Documentation

Hubbell's phi

Description

Hubbell's phi: counts of species abundances

Usage

phi(x,addnames=TRUE)

Arguments

x Ecosystem vector; is coerced to class count
addnames Boolean with default TRUE meaning to set the name of the ith element to the species with abundance i if unique. Set to FALSE to suppress this, which is useful if the species names are long

Details

Function phi() coerces its argument to a count object and by default returns a named vector whose ith element is the number of species with i individuals. The name of the ith element is the species with abundance i if unique and empty otherwise. Function phi() is used by theta.prob().

Note

The code for setting the names is a dog's breakfast

Author(s)

Robin K. S. Hankin

References

S. P. Hubbell 2001. “The Unified Neutral Theory of Biodiversity”. Princeton University Press.

See Also

preston

Examples

data(butterflies)
phi(butterflies,add=FALSE)

[Package untb version 1.4-2 Index]