alonso {untb} | R Documentation |
Various functions from Alonso and McKane 2004 dealing with analytical solutions of a neutral model of biodiversity
alonso.eqn6(JM, n, theta) alonso.eqn11(J, n, theta) alonso.eqn12(J, n, theta, give=FALSE)
J,JM |
Size of the community and metacommunity respectively |
n |
Abundance |
theta |
Biodiversity constant |
give |
In function alonso.eqn12() , Boolean with default
FALSE meaning to return the value of the integral, and
TRUE meaning to return the full output of integrate() |
Notation follows that of Alonso and McKane 2004
Function alonso.eqn6()
is identical to function
vallade.eqn5()
Robin K. S. Hankin
D. Alonso and A. J. McKane 2004. “Sampling Hubbell's neutral model of biodiversity”, Ecology Letters 7:901-910
J <- 100 plot(1:J , alonso.eqn11(J,n=1:J, theta=5),log="y",type="l",xlab="n",ylab=expression(S(n)),main="Eqns 11 and 12 of Alonso and McKane") points(1:J , alonso.eqn12(J,n=1:J, theta=5),type="l",lty=2) legend("topright",legend=c("equation 11","equation 12"),lty=1:2)