expected.abundance
From untb v1.7-2
by Robin K S Hankin
Expected abundances under the neutral model
Returns a vector of expected abundances of the i-th ranked species under the neutral model
- Keywords
- math
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.
References
S. P. Hubbell 2001. “The Unified Neutral Theory of Biodiversity”. Princeton University Press.
See Also
Examples
expected.abundance(J=10,theta=3)
sum(expected.abundance(J=10,theta=3)) #should be 10
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