Obtain in matrix form the OMEGA matrix. This is primarily to feed into other
packages such as mrgsolve.
omega_matrix(r)An nm object.
A matrix object.
## requires NONMEM to be installed
if (FALSE) {
## matrix of initial estimates
m1 %>% omega_matrix()
## matrix of final estimates
m1 %>%
update_parameters() %>%
omega_matrix()
}