constrainFun

Given a model object from <code>asreml</code> and a range of estimates of the
parameter, the function will supply the likelihood ratio test statistic for
the comparison of the full model to one where the parameter of interest is
constrained.

Constructs (non)additive genetic relationship matrices, and their
inverses, from a pedigree to be used in linear mixed effect models (A.K.A.
the 'animal model'). Also includes other functions to facilitate the use of
animal models. Some functions have been created to be used in conjunction
with the R package 'asreml' for the 'ASReml' software, which can be
obtained upon purchase from 'VSN' international
(<https://vsni.co.uk/software/asreml>).

Matthew Wolak

nadiv

(Non)Additive Genetic Relatedness Matrices

constrainFun function

<dl><dt>parameter.val</dt>
<dd>a value for which the log-Likelihood of a model is to
be calculated</dd>
<dt>full</dt>
<dd>the full model <code>asreml</code> object</dd>
<dt>fm2</dt>
<dd>starting values for the full model</dd>
<dt>comp</dt>
<dd>which variance component to constrain</dd>
<dt>G</dt>
<dd>logical, indicating if the component is part of the G structure</dd>
<dt>mit</dt>
<dd>numeric, indicating maximum number of iterations for the
constrained asreml model</dd></dl>

Arguments

<a href="/link/matthewwolak%40gmail.com?package=nadiv&version=2.18.0" data-mini-rdoc="nadiv::matthewwolak@gmail.com">matthewwolak@gmail.com</a>

Author

Fix a Model Parameter and Conduct Likelihood Ratio Test — constrainFun

<dl>

<dt>parameter.val</dt>
<dd>a value for which the log-Likelihood of a model is to
be calculated</dd>


<dt>full</dt>
<dd>the full model <code>asreml</code> object</dd>


<dt>fm2</dt>
<dd>starting values for the full model</dd>


<dt>comp</dt>
<dd>which variance component to constrain</dd>


<dt>G</dt>
<dd>logical, indicating if the component is part of the G structure</dd>


<dt>mit</dt>
<dd>numeric, indicating maximum number of iterations for the
constrained asreml model</dd>

</dl>

<a href='mailto:matthewwolak@gmail.com'>matthewwolak@gmail.com</a>

constrainFun: Fix a Model Parameter and Conduct Likelihood Ratio Test

Description

Usage

Value

Arguments

Author

See Also