Family function for Negative Binomial GLMs
Usage
negative.binomial(theta=stop("theta must be specified"), link="log")
Arguments
theta
|
The known value of the additional parameter, theta .
|
link
|
The link function. Currently must be one of log , sqrt or identity .
|
Description
Specifies the information required to fit a Negative Binomial generalized
linear model, with known theta
parameter, using glm()
.Value
A list of functions and expressions needed by glm()
to fit a Negative
Binomial generalized linear model.See Also
glm.nb
, anova.negbin
, summary.negbin
Examples
# Fitting a Negative Binomial model to the qine data
# with theta=2 assumed known.
#
data(quine)
quine.nb <- glm(Days ~ .^4, family=neg.bin(2), data=quine)