This function extracts the structure for multi trait models for the random and rcov formulas of mmer2.
vctable.help(random=NULL,rcov=NULL, data)
formula for random terms.
formula for residual terms.
dataset.
trait structures for each random and residual term.
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