Rev Language Reference

dnNbinomial - Negative Binomial Distribution

Negative binomial probability distribution of x successes before r failures.

Aliases

  • dnNbinom

Usage

dnNbinomial(Natural size, Probability p)

Arguments

size : Natural (pass by const reference)
Number of failures.
p : Probability (pass by const reference)
Probability of success.

Domain Type

Natural

Details

The negative binomial probability distribution describes the number of successes before r failures, where the success probability is p. The probability is given by (x + r - 1 choose x) p^(x) * (1-p)^r

Example

p ~ dnBeta(1.0,1.0)
x ~ dnNegativeBinomial(r=10,p)
x.clamp(8)
moves[1] = mvSlide(p, delta=0.1, weight=1.0)
monitors[1] = screenmonitor(printgen=1000, separator = "        ", x)
mymodel = model(p)
mymcmc = mcmc(mymodel, monitors, moves)
mymcmc.burnin(generations=20000,tuningInterval=100)
mymcmc.run(generations=200000)

See Also

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