Function expression classes.
- Look at function formats that are concrete classes.
- Value Functions
- Value functions only compute values, not metrics.
- Value Vector Functions
- Value vector functions compute values and one type of vectors.
- Factor Vector Ranking Functions
- Functions that ranks factor variables based on the vector metrics.
- Map Variable Ranking Functions
- Functions that ranks variables based on mapped parameter expressions.
- Parameter Ranking Functions
- Functions that ranks parameters based on values.