checkinputs             Check inputs to function.
inscoreopt              In-Sample Score Optimisation by Stochastic
                        Gradient Descent
scoreopt                Score optimisation by Stochastic Gradient
                        Descent
scoreopt.control        Tuning parameters for score optimisation by
                        Stochastic Gradient Descent
sim_hierarchy           Synthetic hierarchical data from stationary
                        Gaussian ARMA models.
total_score             Total score (and gradient) for reconciled
                        forecast
