| aerr_sf | Absolute error scoring function | 
| aperr_sf | Absolute percentage error scoring function | 
| bmedian_sf | beta-median scoring function | 
| bregman1_sf | Bregman scoring function (type 1) | 
| bregman2_sf | Bregman scoring function (type 2, Patton scoring function) | 
| bregman3_sf | Bregman scoring function (type 3, QLIKE scoring function) | 
| bregman4_sf | Bregman scoring function (type 4, Patton scoring function) | 
| capping_function | Capping function | 
| expectile_sf | Asymmetric piecewise quadratic scoring function (expectile scoring function) | 
| ghuber_sf | Generalized Huber scoring function | 
| gpl1_sf | Generalized piecewise linear scoring function (type 1) | 
| gpl2_sf | Generalized piecewise linear scoring function (type 2) | 
| huber_sf | Huber scoring function | 
| maelog_sf | MAE-LOG scoring function | 
| maesd_sf | MAE-SD scoring function | 
| obsweighted_sf | Observation-weighted scoring function | 
| quantile_sf | Asymmetric piecewise linear scoring function (quantile scoring function) | 
| relerr_sf | Relative error scoring function (MAE-PROP scoring function) | 
| serr_sf | Squared error scoring function | 
| sperr_sf | Squared percentage error scoring function | 
| srelerr_sf | Squared relative error scoring function |