expected.abundance {untb}

Expected abundances under the neutral model

Description

Returns a vector of expected abundances of the i-th ranked species under the neutral model

Usage

expected.abundance(J, theta)

Arguments

J

Size of the ecosystem

theta

Biodiversity parameter

Value

Returns an object of class count. Species names (capital letters) are assigned by function count().

Note

Function is very slow even for moderate J.

Author(s)

Robin K. S. Hankin

References

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

See Also

rand.neutral,count

Examples

expected.abundance(J=10,theta=3)

sum(expected.abundance(J=10,theta=3))  #should be 10