This method initializes
object by evaluating its associated
covariate(s) and grouping factor, if any is present, in
data,
calculating various dimensions and constants used by optimization
algorithms involving
corStruct objects (see the appropriate
Dim
method documentation), and assigning initial values for
the coefficients in
object, if none were present.
USAGE:
initialize(object, data, ...)
REQUIRED ARGUMENTS:
object
an object inheriting from class
corStruct
representing a correlation structure.
data
a data frame in which to evaluate the variables defined in
formula(object).
OPTIONAL ARGUMENTS:
...
this argument is included to make this method compatible
with the generic.
VALUE:
an initialized object with the same class as
object
representing a correlation structure.