logLik.glsStruct            package:nlme            R Documentation

Log-Likelihood of a glsStruct Object

Description:

     'Pars' is used to update the coefficients of the model components
     of 'object' and the individual (restricted) log-likelihood
     contributions of each component are added together. The type of
     log-likelihood (restricted or not) is determined by the 'settings'
     attribute of 'object'.

Usage:

     ## S3 method for class 'glsStruct':
     logLik(object, Pars, conLin, ...)

Arguments:

  object: an object inheriting from class 'glsStruct', representing a
          list of linear model components, such as 'corStruct' and
          'varFunc' objects.

    Pars: the parameter values at which the (restricted) log-likelihood
          is to be evaluated.

  conLin: an optional condensed linear model object, consisting of a
          list with components '"Xy"', corresponding to a regression
          matrix ('X') combined with a response vector ('y'), and 
          '"logLik"', corresponding to the log-likelihood of the
          underlying linear model. Defaults to 'attr(object,
          "conLin")'.

     ...: some methods for this generic require additional arguments. 
          None are used in this method.

Value:

     the (restricted) log-likelihood for the linear model described by
     'object', evaluated at 'Pars'.

Author(s):

     Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates
     bates@stat.wisc.edu

See Also:

     'gls', 'glsStruct', 'logLik.lme'

