LinearTerm

A plain linear (parametric) term, e.g. x1 or group.

Usage

Source

LinearTerm(variable)

Represents a bare covariate name on the right-hand side of a formula — anything that is not wrapped in s(), te(), ti(), t2(), or offset(), and does not use */: interaction syntax. The column is entered into the model matrix unmodified (numeric columns as a single linear column; string/categorical columns are expanded to dummy indicator columns) and contributes a single unpenalized coefficient (or one per non-reference level, for a factor) to the linear predictor. Use a LinearTerm for effects you want to assume are linear, or for categorical covariates; use a SmoothTerm when you want the data to determine the shape of the relationship.

Parameters

variable: str

Name of the data column this term refers to.