atr {sommer}

atr covariance structure

Description

atr creates a diagonal covariance structure for specific levels of the random effect to be used with the mmer solver.

Usage

  atr(x, levs)

Arguments

x

vector of observations for the random effect.

levs

levels of the random effect to use for building the incidence matrices.

Value

$res

a list with the provided vector and the variance covariance structure expected.

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 vsr to know how to use atr in the mmer solver.

Examples

x <- as.factor(c(1:5,1:5,1:5));x
atr(x)
atr(x, c("1","2"))