| logDet.corStruct {nlme} | R Documentation |
Extract corStruct Log-Determinant
Description
This method function extracts the logarithm of the determinant of a
square-root factor of the correlation matrix associated with
object, or the sum of the log-determinants of square-root
factors of the list of correlation matrices associated with
object.
Usage
## S3 method for class 'corStruct'
logDet(object, covariate, ...)
Arguments
object |
an object inheriting from class |
covariate |
an optional covariate vector (matrix), or list of
covariate vectors (matrices), at which values the correlation matrix,
or list of correlation matrices, are to be evaluated. Defaults to
|
... |
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 correlation matrix
associated with object, or the sum of the log-determinants of
square-root factors of the list of correlation matrices associated
with object.
Author(s)
José Pinheiro and Douglas Bates bates@stat.wisc.edu
See Also
logLik.corStruct,
corMatrix.corStruct,
logDet
Examples
cs1 <- corAR1(0.3)
logDet(cs1, covariate = 1:4)