DPI                     The Directed Prediction Index (DPI).
DPI_curve               The DPI curve analysis.
cor_network             Correlation and partial correlation networks.
dag_network             Directed acyclic graphs (DAGs) via Bayesian
                        networks (BNs).
matrix_cor              Produce a symmetric correlation matrix from
                        values.
sim_data                Simulate data from a multivariate normal
                        distribution.
sim_data_exp            Simulate experiment-like data with
                        _independent_ binary Xs.
