https://github.com/cran/aster
Tip revision: c651dababa29dbc9b4cc34906c535a0ed860432b authored by Charles J. Geyer on 19 July 2005, 00:00:00 UTC
version 0.2
version 0.2
Tip revision: c651dab
famnzp.R
library(aster)
famnam <- families()
ifam <- seq(along = famnam)[famnam == "non.zero.poisson"]
print(ifam)
mu <- seq(0.1, 3.0, 0.2)
theta <- log(mu)
zeroth <- double(length(theta))
first <- double(length(theta))
second <- double(length(theta))
for (i in seq(along = theta)) {
zeroth[i] <- famfun(ifam, 0, theta[i])
first[i] <- famfun(ifam, 1, theta[i])
second[i] <- famfun(ifam, 2, theta[i])
}
all.equal(zeroth, log(exp(mu) - 1))
tau <- mu / (1 - exp(- mu))
all.equal(first, tau)
all.equal(second, tau * (1 - tau * exp(- mu)))