R: Default identity variance models

indep_vs {asreml}

R Documentation

Default identity variance models

Description

Model functions for identity variance structures.

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", and "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, respectively.

Functions

asr_id(): Identity correlation model (no variance associated).
asr_idv(): Identity variance model.
asr_idh(): Heterogeneous identity (diagonal) variance model.

[Package asreml version 4.2.0.480 Index]