Initialize corStruct Object

Usage

initialize(object, data, ...)

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).
... this argument is included to make this method compatible with the generic.

Description

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.

Value

an initialized object with the same class as object representing a correlation structure.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

Dim.corStruct

Examples

library(lme)
data(Orthodont)
cs1 <- corAR1(form = ~ 1 | Subject)
cs1 <- initialize(cs1, data = Orthodont)

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