negative.binomial
From MASS v7.3-0
by Brian Ripley
Family function for Negative Binomial GLMs
Specifies the information required to fit a Negative Binomial generalized
linear model, with known theta
parameter, using glm()
.
- Keywords
- models, regression
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, as a character string, name or one-element
character vector specifying one of
log
,sqrt
oridentity
, or an object of class"link-glm"
Value
- An object of class
"family"
, a list of functions and expressions needed byglm()
to fit a Negative Binomial generalized linear model.
References
Venables, W. N. and Ripley, B. D. (1999) Modern Applied Statistics with S-PLUS. Third Edition. Springer.
See Also
Examples
# Fitting a Negative Binomial model to the quine data
# with theta = 2 assumed known.
#
glm(Days ~ .^4, family = negative.binomial(2), data = quine)
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