nlme (version 3.1-163)

as.matrix.reStruct: 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 reStruct
as.matrix(x, ...)

Value

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

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.

Author

José Pinheiro and Douglas Bates

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)