logDet.pdMat {nlme}R Documentation

Extract Log-Determinant from a pdMat Object

Description

This method function extracts the logarithm of the determinant of a square-root factor of the positive-definite matrix represented by object.

Usage

logDet(object)

Arguments

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

Value

the log-determinant of a square-root factor of the positive-definite matrix represented by object.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

pdMat

Examples

library(nlme)
pd1 <- pdSymm(diag(1:3))
logDet(pd1)


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