logLik {base}R Documentation

Extract Log-Likelihood

Description

This function is generic; method functions can be written to handle specific classes of objects. Classes which already have methods for this function include: lm, nls in package nls, and gls, lme and others in package nlme.

Usage

logLik(object, ...)

Arguments

object any object from which a log-likelihood value, or a contribution to a log-likelihood value, can be extracted.
... some methods for this generic function require additional arguments.

Value

Returns an object, say r, of class logLik which is a number with attributes, attr(r, "df") (degrees of freedom) giving the number of parameters in the model. There's a simple print method for logLik objects.
The details depend on the method function used; see the appropriate documentation.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

logLik.lm, logLik.nls, logLik.gls, logLik.lme, etc.

Examples

## see the method function documentation