recalc.corStruct            package:nlme            R Documentation

Recalculate for corStruct Object

Description:

     This method function pre-multiples the '"Xy"' component of
     'conLin' by the transpose square-root factor(s) of the correlation
     matrix (matrices) associated with 'object' and adds the
     log-likelihood contribution of 'object', given by
     'logLik(object)', to the '"logLik"' component of 'conLin'.

Usage:

     ## S3 method for class 'corStruct':
     recalc(object, conLin, ...)

Arguments:

  object: an object inheriting from class 'corStruct', representing a
          correlation structure.

  conLin: a 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 model.

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

Value:

     the recalculated condensed linear model object.

Note:

     This method function is only used inside model fitting functions,
     such as 'lme' and 'gls', that allow correlated error terms.

Author(s):

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

See Also:

     'corFactor', 'logLik.corStruct'

