

   LLiinneeaarr MMiixxeedd--EEffffeeccttss SSttrruuccttuurree

        lmeStruct(reStruct, corStruct, varStruct)

   AArrgguummeennttss::

   reStruct: a `reStruct' representing a random effects struc-
             ture.

   corStruct: an optional `corStruct' object, representing a
             correlation structure. Default is `NULL'.

   varStruct: an optional `varFunc' object, representing a
             variance function structure. Default is `NULL'.

   DDeessccrriippttiioonn::

        A linear mixed-effects structure is a list of model
        components representing different sets of parameters in
        the linear mixed-effects model. An `lmeStruct' list
        must contain at least a `reStruct' object, but may also
        contain `corStruct' and `varFunc' objects. `NULL' argu-
        ments are not included in the `lmeStruct' list.

   VVaalluuee::

        a list of model components determining the parameters
        to be estimated for the associated linear mixed-effects
        model.

   AAuutthhoorr((ss))::

        Jose Pinheiro and Douglas Bates

   SSeeee AAllssoo::

        `lme', `reStruct', `corStruct', `varFunc'

   EExxaammpplleess::

        library(lme)
        lms1 <- lmeStruct(reStruct(~age), corAR1(), varPower())

