Does a variable appear more than once in interactions?
If not then pick first LHS interaction term.
Finally, if there are no interactions then pick last main effect term.
Usage
guess_treatment_name(formula)
Arguments
- formula
Linear regression formula object. Prognostic factors (PF) are main effects and effect modifiers (EM) are
interactions with the treatment variable, e.g., y ~ X1 + trt + trt:X2. For covariates as both PF and EM use * syntax.
Value
Treatment name string.
