| npsdr | A unified Principal sufficient dimension reduction method via kernel trick |
| npsdr_x | Reconstruct estimated sufficient predictors for new data |
| plot.npsdr | Plot sufficient predictors from an npsdr object |
| plot.psdr | Plot sufficient predictors from a psdr object |
| psdr | Unified linear principal sufficient dimension reduction methods |
| psdr_bic | Structural dimension selection for principal SDR |
| rtpsdr | Real time sufficient dimension reduction through principal least squares SVM |