logDet.reStruct {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)

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