constrainFun: Fix a Model Parameter and Conduct Likelihood Ratio Test

In nadiv: (Non)Additive Genetic Relatedness Matrices

Fix a Model Parameter and Conduct Likelihood Ratio Test

Description

Given a model object from asreml 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.

Usage

constrainFun(parameter.val, full, fm2, comp, G, mit = 600)

Arguments

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

Value

A vector of length 1 returning either a numeric value corresponding to the likelihood ratio test statistic or else the missing value indicator NA.

Author(s)

[e-mail]

See Also

See also LRTest

nadiv documentation built on May 29, 2024, 10:40 a.m.