solve.reStruct {nlme} | R Documentation

## Apply Solve to an reStruct Object

### Description

`Solve` is applied to each `pdMat` component of `a`, which results in inverting the positive-definite matrices they represent.

### Usage

    ## S3 method for class 'reStruct':
    solve(a, b, ...)

### Arguments

`a` | an object inheriting from class `reStruct`, representing a random effects structure and consisting of a list of `pdMat` objects.
`b` | this argument is only included for consistency with the generic function and is not used in this method function.
`...` | some methods for this generic require additional arguments. None are used in this method.

### Value

an `reStruct` object similar to `a`, but with the `pdMat` components representing the inverses of the matrices represented by the components of `a`.

### Author(s)

Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu

### See Also

`solve.pdMat`, `reStruct`

### Examples

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

[Package nlme version 3.1-68.1 Index]