Interactions¶
Interactions between features are specified via the interactions parameter. The interaction type is auto-detected from the parent feature specs.
model = SuperGLM(
features={"age": Spline(k=14), "region": Categorical()},
interactions=[("age", "region")],
selection_penalty=0.01,
)
model.fit(df, y, sample_weight=exposure)
Auto-detected interaction types¶
| Parent types | Interaction class | Groups |
|---|---|---|
| Spline + Categorical | SplineCategorical |
One spline group per non-base level |
| Polynomial + Categorical | PolynomialCategorical |
One polynomial group per non-base level |
| Numeric + Categorical | NumericCategorical |
Single group with per-level slopes |
| Categorical + Categorical | CategoricalInteraction |
Single group with cross-level indicators |
| Numeric + Numeric | NumericInteraction |
Single group (product term) |
| Polynomial + Polynomial | PolynomialInteraction |
Single group (tensor product) |