nadiv (version 2.9)

varTrans: Transforms ASReml-R gamma variances to component scale

Description

The inverse of the Average Information matrix in an ASReml-R object produces the sampling variances of the random effects on the gamma scale. This function scales these variances to the original component scale. This allows for Confidence Intervals to be constructed about the variance component estimates.

Usage

varTrans(asr.object)

Arguments

asr.object

Object from a call to asreml

Value

• Returns a numeric vector of variances for each variance component in an ASReml-R model.

Examples

library(asreml)
    ginvA <- asreml.Ainverse(warcolak)$ginv
    ginvD <- makeD(warcolak[,1:3])$listDinv
    warcolak$IDD <- warcolak$ID
    warcolak.mod <- asreml(trait1 ~ 1, random = ~ped(ID) + giv(IDD), 
	ginverse = list(ID = ginvA, IDD = ginvD), data = warcolak) 
    summary(warcolak.mod)$varcomp
    varTrans(warcolak.mod)