as.matrix.pdMat {nlme}R Documentation

Matrix of a pdMat Object

Description

This method function extracts the positive-definite matrix represented by x.

Usage

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

Arguments

x an object inheriting from class pdMat, representing a positive-definite matrix.

Value

a matrix corresponding to the positive-definite matrix represented by x.

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

pdMat, corMatrix

Examples

as.matrix(pdSymm(diag(4)))
[Package nlme version 3.1-78 Index]