Approximate stratum variances

Description

Generic function to calculate approximate stratum variances, degrees of freedom and coefficients for variance component models. The available method is for asreml class objects.

Usage

asv(object, ...)

Arguments

Details

For linear mixed effects model, it is often possible to consider a natural ordering of the variance component parameters, including the residual. Based on an idea due to Thompson, 1980; here, asreml computes approximate stratum degrees of freedom and stratum variances by a modified Cholesky diagonalisation of the average information matrix.

See Also

asv.asreml