at covariance structure
at
creates a diagonal covariance structure for specific levels of the random effect.
at(x, levs)
x |
vector of observations for the random effect. |
levs |
levels of the random effect to use for building the incidence matrices. |
a list with the provided vector and the variance covariance structure expected.
Giovanny Covarrubias-Pazaran
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
x <- as.factor(c(1:5,1:5,1:5));x at(x) at(x, c("1","2"))
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