| build_Ej | Build E_j tensor structure |
| calculate_u_statistics_pure_r_six | Compute U-statistics HOIF-type from Order 2 to 6 in pure R code. |
| compute_basis_matrix | Compute basis projection matrices |
| compute_gram_inverse | Compute inverse of weighted Gram matrix |
| compute_hoif_estimators | Compute HOIF Estimators for ATE |
| compute_residuals | Compute residuals for both treatment groups |
| hoif_ate | Main function: HOIF estimators for ATE with optional sample splitting |
| plot.hoif_ate | Plot convergence of ATE estimates |
| print.hoif_ate | Print method for hoif_ate objects |
| transform_covariates | HOIF Estimators for Average Treatment Effect |