| expected.abundance {untb} | R Documentation |
Returns a vector of expected abundances of the i-th ranked species under the neutral model
expected.abundance(J, theta)
J |
Size of the ecosystem |
theta |
Biodiversity parameter |
Returns an object of class count. Species names (capital
letters) are assigned by function count().
Function is very slow even for moderate J.
Robin K. S. Hankin
S. P. Hubbell 2001. “The Unified Neutral Theory of Biodiversity”. Princeton University Press.
expected.abundance(J=10,theta=3) sum(expected.abundance(J=10,theta=3)) #should be 10