| .add_namespace | Lookup namespace of contrast scheme function |
| .get_from_params | Retrieve value from param list |
| .warn_if_nondefault | Warn user if nondefault contrasts are set |
| as.unordered | Convert to unordered factor |
| backward_difference_code | Backward difference code |
| cumulative_split_code | Cumulative split contrasts |
| decompose_contrasts | Decompose contrasts into new columns |
| enlist_contrasts | List of contrast matrices |
| forward_difference_code | Forward difference code |
| glimpse_contrasts | Glimpse contrasts in dataframe |
| helmert_code | Helmert code |
| interpret_intercept | Interpret intercept from contrasts |
| is.unordered | Check for unordered factor |
| is_centered | Check for orthogonality |
| is_orthogonal | Check for orthogonality |
| orth_polynomial_code | Orthogonal Polynomial code |
| polynomial_code | Orthogonal Polynomial code |
| raw_polynomial_code | Raw Polynomial code |
| reverse_helmert_code | Reverse Helmert code |
| scaled_sum_code | Scaled sum coding |
| set_contrasts | Set contrasts to dataframe |
| sum_code | Sum code |
| treatment_code | Treatment code |
| use_contrasts | Contrast code factors |
| use_contrasts.AsIs | AsIs method for use_contrasts |
| use_contrasts.default | Default method for use_contrasts |
| use_contrasts.function | Function method for use_contrasts |
| use_contrasts.hypr | Use a hypr object for contrasts |
| use_contrasts.matrix | Matrix method for use_contrasts |
| use_contrasts.name | Symbol method for use_contrasts |