logDet.reStruct             package:nlme             R Documentation

Extract reStruct Log-Determinants

Description:

     Calculates, for each of the 'pdMat' components of 'object', the
     logarithm of the determinant of a square-root factor.

Usage:

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

Arguments:

  object: an object inheriting from class 'reStruct', representing a
          random effects structure and consisting of a list of 'pdMat'
          objects.

     ...: some methods for this generic require additional arguments. 
          None are used in this method.

Value:

     a vector with the log-determinants of square-root factors of the
     'pdMat' components of 'object'.

Author(s):

     Jose Pinheiro

See Also:

     'reStruct', 'pdMat'

Examples:

     rs1 <- reStruct(list(A = pdSymm(diag(1:3), form = ~Score),
       B = pdDiag(2 * diag(4), form = ~Educ)))
     logDet(rs1)

