id {asreml} | R Documentation

## Default identity variance models.

### Description

Model functions for identlty variance models.

### Usage

    id(obj)

    idv(obj, init=NA)

    idh(obj, init=NA)

### Arguments

`obj` | A factor in `data`.
`init` | Optional vector of initial values with an optional `names` attribute from the set {“P”, “U”, “F”} specifying the boundary constraint for each parameter as positive, unconstrained or fixed, respectively.

### Details

The class of identity models includes the null correlation model `id`, and its homogeneous and heterogeneous variance forms (`idv` and `idh`).

### Functions

- `asr_idv`: Identity variance model.

- `asr_idh`: Heterogeneous identity (diagonal) variance model.

[Package asreml version 4.1.0.176 Index]