# R: Assign Matrix to a pdMat Object

Matrix.pdMat {nlme} | R Documentation

## Assign Matrix to a pdMat Object

### Description

The positive-definite matrix represented by `object` is replaced by `value`. If the original matrix had row and/or column names, the corresponding names for `value` can either be `NULL`, or a permutation of the original names.

### Usage

    ## S3 method for class 'pdMat':
    matrix(object) <- value

### Arguments

`object` | an object inheriting from class `pdMat`, representing a positive definite matrix.
`value` | a matrix with the new values to be assigned to the positive-definite matrix represented by `object`. Must have the same dimensions as `as.matrix(object)`.

### Value

a `pdMat` object similar to `object`, but with its coefficients modified to produce the matrix in `value`.

### Author(s)

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

### See Also

`pdMat`,`"matrix<-"`

### Examples

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

[Package nlme version 3.1-85 Index]