isc {sommer}

identity covariance structure

Description

isc creates a diagonal covariance structure for the levels of the random effect to be used with the mmec solver.

Usage

  isc(x, thetaC=NULL, theta=NULL)

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

See the function vsc to know how to use isc in the mmec solver.

Examples

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