This function provides the variance-covariance matrix of the estimates. vcov is an alias for it.
VarCov(x)an object of class hlme, lcmm, multlcmm or
Jointlcmm
a matrix containing the variance-covariance of the estimates. For
the parameters of the matrix of variance-covariance of the random effects,
the Cholesky transformed parameters are considered so that VarCov provides
the covariance matrix of function estimates with cholesky=TRUE.