usc: unstructured covariance structure

In sommer: Solving Mixed Model Equations in R

unstructured covariance structure

Description

usc creates an unstructured covariance structure for specific levels of the random effect to be used with the mmec solver.

Usage

  usc(x, thetaC, theta)

Arguments

x	vector of observations for the random effect.
thetaC	an optional matrix for constraints in the variance components.
theta	an optional matrix for initial values of the variance components.

Value

$res

a list with the provided vector and the variance covariance structure expected for the levels of the random effect.

Author(s)

Giovanny Covarrubias-Pazaran

References

Covarrubias-Pazaran G (2016) Genome assisted prediction of quantitative traits using the R package sommer. PLoS ONE 11(6): doi:10.1371/journal.pone.0156744

See Also

The function vsc to know how to use usc in the mmec solver.

Examples

x <- as.factor(c(1:5,1:5,1:5));x
usc(x)

sommer documentation built on Nov. 13, 2023, 9:05 a.m.