as.matrix.corStruct {nlme}R Documentation

Matrix of a corStruct Object

Description

This method function extracts the correlation matrix, or list of correlation matrices, associated with object.

Usage

as.matrix(x)

Arguments

x an object inheriting from class corStruct, representing a correlation structure.

Value

If the correlation structure includes a grouping factor, the returned value will be a list with components given by the correlation matrices for each group. Otherwise, the returned value will be a matrix representing the correlation structure associated with object.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

corClasses, corMatrix

Examples

library(nlme)
data(Orthodont)
cst1 <- corAR1(form = ~1|Subject)
cst1 <- initialize(cst1, data = Orthodont)
as.matrix(cst1)


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