| code_control | Coding matrix functions for factors in linear model formulae |
| code_control_last | Coding matrix functions for factors in linear model formulae |
| code_deviation | Coding matrix functions for factors in linear model formulae |
| code_deviation_first | Coding matrix functions for factors in linear model formulae |
| code_diff | Coding matrix functions for factors in linear model formulae |
| code_diff_forward | Coding matrix functions for factors in linear model formulae |
| code_helmert | Coding matrix functions for factors in linear model formulae |
| code_helmert_forward | Coding matrix functions for factors in linear model formulae |
| code_poly | Coding matrix functions for factors in linear model formulae |
| Codings | Coding matrix functions for factors in linear model formulae |
| contr.diff | Coding matrix functions for factors in linear model formulae |
| mean_contrasts | Display contrasts |