# negative.binomial

From MASS v7.3-20
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`

or`identity`

, or an object of class`"link-glm"`

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##### Value

- An object of class
`"family"`

, a list of functions and
expressions needed by `glm()`

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)
```

* Documentation reproduced from package MASS, version 7.3-20,
License: GPL-2 | GPL-3
*
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