nlme: logLik.varFunc – R documentation

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logLik.varFunc

Extract varFunc logLik

Description

This method function extracts the component of a Gaussian log-likelihood associated with the variance function structure represented by object, which is equal to the sum of the logarithms of the corresponding weights.

Usage

## S3 method for class 'varFunc'
logLik(object, data, ...)

Arguments

`object`	an object inheriting from class `"varFunc"`, representing a variance function structure.
`data`	this argument is included to make this method function compatible with other `logLik` methods and will be ignored.
`...`	some methods for this generic require additional arguments. None are used in this method.

Value

the sum of the logarithms of the weights corresponding to the variance function structure represented by object.

Author(s)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

vf1 <- varPower(form = ~age)
vf1 <- Initialize(vf1, Orthodont)
coef(vf1) <- 0.1
logLik(vf1)

nlme

Linear and Nonlinear Mixed Effects Models

v3.1-152

GPL (>= 2) | file LICENCE

Authors

José Pinheiro [aut] (S version), Douglas Bates [aut] (up to 2007), Saikat DebRoy [ctb] (up to 2002), Deepayan Sarkar [ctb] (up to 2005), EISPACK authors [ctb] (src/rs.f), Siem Heisterkamp [ctb] (Author fixed sigma), Bert Van Willigen [ctb] (Programmer fixed sigma), Johannes Ranke [ctb] (varConstProp()), R-core [aut, cre]

Initial release

2021-02-03