| lfactors-package | Allow a user to use == and %in% on an lfactor for both the label and the level defined when creating the lfactor. This is especially useful when labels are long and users know the levels well. |
| inlf | Implements %in% for lfactors |
| lfactor | Lfactors |
| llevels | Numeric Levels of an lfactor |
| mlfactor | 'match' function for lfactors |