as.matrix.reStruct {nlme}R Documentation

Matrices of an reStruct Object

Description

This method function extracts the positive-definite matrices corresponding to the pdMat elements of object.

Usage

## S3 method for class 'reStruct':
as.matrix(x, ...)

Arguments

x an object inheriting from class reStruct, representing a random effects structure and consisting of a list of pdMat objects.
... further arguments passed from other methods.

Value

a list with components given by the positive-definite matrices corresponding to the elements of object.

Author(s)

Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu

References

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York.

See Also

as.matrix.pdMat, reStruct, pdMat

Examples

rs1 <- reStruct(pdSymm(diag(3), ~age+Sex, data = Orthodont))
as.matrix(rs1)

[Package nlme version 3.1-80 Index]