in_interaction: Determine if a predictor is involved in an interaction
Description
This presently does not work for any term like poly(x, 3) or I(x^2),
since the terms object contains those names, not the names of the underlying
predictors.
Usage
in_interaction(formula, predictor)
Value
TRUE if in an interaction, FALSE otherwise
Arguments
- formula
Model formula
- predictor
Predictor to check for, as character vector