R: Variance Weights for lmeStruct Object

varWeights.lmeStruct {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)

José Pinheiro 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.