object
an object inheriting from class lmeStruct,
representing a list of linear mixed-effects model components, such as
reStruct, corStruct, and varFunc objects.
level
an optional integer vector giving the level(s) of grouping
to be used in extracting the residuals from object. Level
values increase from outermost to innermost grouping, with
level zero corresponding to the population fitted values.
lmeFit
an optional list with components beta and b
containing respectively the fixed effects estimates and the random
effects estimates to be used to calculate the residuals. Defaults
to attr(object, "lmeFit").
conLin
an optional condensed linear model object, consisting of
a list with components "Xy", corresponding to a regression
matrix (X) combined with a response vector (y), and
"logLik", corresponding t