Names.pdMat {nlme} | R Documentation

## Names of a pdMat Object

### Description

This method function returns the fist element of the `Dimnames` attribute of `object`, which contains the column names of the matrix represented by `object`.

### Usage

    ## S3 method for class 'pdMat':
    Names(object, ...)
    ## S3 method for class 'pdMat':
    Names(object, ...) <- value

### Arguments

`object` | an object inheriting from class `pdMat`, representing a positive-definite matrix.
`value` | a character vector with the replacement values for the column and row names of the matrix represented by `object`. It must have length equal to the dimension of the matrix represented by `object` and, if names have been previously assigned to `object`, it must correspond to a permutation of the original names.
`...` | some methods for this generic require additional arguments. None are used in this method.

### Value

if `object` has a `Dimnames` attribute then the first element of this attribute is returned; otherwise `NULL`.

### SIDE EFFECTS

On the left side of an assignment, sets the `Dimnames` attribute of `object` to `list(value, value)`.

### Author(s)

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

### See Also

`Names`, `Names.pdBlocked`

### Examples

    data(Orthodont)
    pd1 <- pdSymm(~age, data = Orthodont)
    Names(pd1)

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