Extract Log-Determinant from a pdMat Object

Usage

logDet(object)

Arguments

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

Description

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

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(lme)
pd1 <- pdSymm(diag(1:3))
logDet(pd1)


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