Matrix.pdMat {nlme} | R Documentation

## Assign Matrix to a pdMat or pdBlocked 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 replacement method for class 'pdMat'
    matrix(object) <- value
    ## S3 replacement method for class 'pdBlocked'
    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` or `pdBlocked` object similar to `object`, but with its coefficients modified to produce the matrix in `value`.

### Author(s)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

### See Also

`pdMat`, `"matrix<-"`

### Examples

    class(pd1 <- pdSymm(diag(3))) # "pdSymm" "pdMat"
    matrix(pd1) <- diag(1:3)
    pd1

[Package nlme version 3.1-131 Index]