untb (version 1.3-3)

phi: 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 $i$th 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 $i$th element is the number of species with $i$ individuals. The name of the $i$th element is the species with abundance $i$ if unique and empty otherwise. Function phi() is used by theta.prob().

References

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

See Also

preston

Examples

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