.\" -*- nroff -*- generated from .Rd format
.BG
.FN glsStruct
.TL
Generalized Least Squares Structure
.DN
A generalized least squares structure is a list of model components
representing different sets of parameters in the linear 
model. A `glsStruct'  may contain `corStruct' and
`varFunc' objects. `NULL' arguments are not included in the
`glsStruct' list.
.CS
glsStruct(corStruct, varStruct)
.OA
.AG corStruct
an optional `corStruct' object, representing a
correlation structure. Default is `NULL'.
.AG varStruct
an optional `varFunc' object, representing a
variance function structure. Default is `NULL'.
.RT
a list of model variance-covariance components determining the
parameters to be estimated for the associated linear model.

.SA
`gls', `corClasses', `varClasses'
.EX
gls1 <- glsStruct(corAR1(), varPower())
.KW models
.WR
