Prepare working covariance arguments
Details
The following arguments are supported:
nameThe working covariance function. Currently, only
"compound_symmetry"is supported.estimateWhether to estimate the parameters. Must be
TRUE(default) orFALSE.ratioThe ratio of the variance of the random effects to the variance of the error term. If negative, the ratio is estimated to `log(n)`.
correlationThe correlation for AR(1).