varWeights.glsStruct: Variance Weights for glsStruct 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 model is returned.Usage
## S3 method for class 'glsStruct':
varWeights(object)
Arguments
object
an object inheriting from class "glsStruct",
representing a list of linear model components, such as
corStruct and "varFunc" objects. Value
- if
object includes a varStruct component, a vector with
the corresponding variance weights; else, or a vector of ones.
References
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models
in S and S-PLUS", Springer.