estimate_categ_func_data
                        Estimate categorical functional data using the
                        specified link function
estimate_categ_func_data_binomial_parallel
                        Estimate Z and p curves using binomial link
                        GAMs (parallel version)
estimate_categ_func_data_multinomial
                        Estimate Z and p curves for categorical
                        functional data (multinomial case)
estimate_categ_func_data_multinomial_parallel
                        Parallel estimation of Z and p using
                        multinomial link GAM
estimate_categ_func_data_probit
                        Estimate Z and p curves using (generalized)
                        probit or binomial models
estimate_categ_func_data_probit_parallel
                        Parallel estimation of Z and p using (probit or
                        binomial) link GAMs
generate_categ_func_data
                        Generate synthetic categorical functional data
                        (W) and one-hot encoded array (X)
get_x_from_w            Create one-hot encoded functional data array
                        from categorical observations
