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. Defaults to
the highest or innermost level of grouping.
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 to the log-likelihood of the
underlying nlme model. Defaults to attr(object, "conLin")
.