varWeights.lmeStruct          package:nlme          R Documentation

Variance Weights for lmeStruct Object

Description:

     If 'object' includes a 'varStruct' component, the inverse of the
     standard deviations of the variance function structure represented
     by the corresponding 'varFunc' object are returned; else, a vector
     of ones of length equal to the number of observations in the data
     frame used to fit the associated linear mixed-effects model is
     returned.

Usage:

     ## S3 method for class 'lmeStruct':
     varWeights(object)

Arguments:

  object: an object inheriting from class 'lmeStruct', representing a
          list of linear mixed-effects model components, such as
          'reStruct', 'corStruct', and 'varFunc' objects.

Value:

     if 'object' includes a 'varStruct' component, a vector with the
     corresponding variance weights; else, or a vector of ones.

Author(s):

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

References:

     Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S
     and S-PLUS", Springer.

See Also:

     'varWeights'

