nlme: logDet.pdMat – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

logDet.pdMat

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

## S3 method for class 'pdMat'
logDet(object, ...)

Arguments

`object`	an object inheriting from class `"pdMat"`, representing a positive definite matrix.
`...`	some methods for this generic require additional arguments. None are used in this method.

Value

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

Author(s)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

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

nlme

Linear and Nonlinear Mixed Effects Models

v3.1-152

GPL (>= 2) | file LICENCE

Authors

José Pinheiro [aut] (S version), Douglas Bates [aut] (up to 2007), Saikat DebRoy [ctb] (up to 2002), Deepayan Sarkar [ctb] (up to 2005), EISPACK authors [ctb] (src/rs.f), Siem Heisterkamp [ctb] (Author fixed sigma), Bert Van Willigen [ctb] (Programmer fixed sigma), Johannes Ranke [ctb] (varConstProp()), R-core [aut, cre]

Initial release

2021-02-03