| balance | Balances selection frequencies for unequal groups |
| create_formula | Create a sparse-group boosting formula |
| get_coef | Aggregated and raw coefficients in a sparse group boosting model |
| get_coef_path | Path of aggregated and raw coefficients in a sparse-group boosting model |
| get_varimp | Variable importance of a sparse-group boosting model |
| plot_effects | Visualizing a sparse-group boosting model |
| plot_path | Coefficient path of a sparse-group boosting model |
| plot_varimp | Variable importance bar plot of a sparse group boosting model |