# Formula v1.2-4

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## Extended Model Formulas

Infrastructure for extended formulas with multiple parts on the right-hand side and/or multiple responses on the left-hand side (see <doi:10.18637/jss.v034.i01>).

## Functions in Formula

 Name Description model.frame.Formula Model Frame/Matrix/Response Construction for Extended Formulas Formula Extended Formulas: Multiple Responses and Multiple Regressor Parts No Results!