GEP.Fitness

Description

This module contains code related to fitness evaluation. The main purpose of the code is to both evaluate fitnesses of individuals and to sort individuals by fitness. These are intended to all be higher order functions that assume nothing about the purpose of the individuals or the types of inputs being used for fitness testing. The only assumption made currently is that the outputs for test cases are floating point numbers. That likely should change for general purpose usage.

mjsottile@computer.org

Synopsis

fitness_tester :: a -> (a -> b -> Double -> Double -> Double) -> [b] -> [Double] -> Double -> Double

fitness_filter :: [Double] -> [Individual] -> [(Double, Individual)]

sortByFitness :: [(Double, Individual)] -> [(Double, Individual)]

Documentation

fitness_tester

Source

:: a	Expressed individual
-> a -> b -> Double -> Double -> Double	Fitness function
-> [b]	List of symbol tables for test cases
-> [Double]	List of expected outputs for test cases
-> Double	Range of selection. M in original GEP paper equations for fitness.
-> Double	Fitness value for given individual
Fitness evaluator for generic individuals. This needs to go away and use a more general approach like evaluateFitness above.

fitness_filter

Source

:: [Double]	Fitness values
-> [Individual]	Individuals
-> [(Double, Individual)]	Paired fitness/individuals after filtering
Given a list of fitness values and a corresponding list of individuals, return a list of tuples pairing the fitness value with the individuals for only those individuals that have a valid fitness value. This means those that are +/- infinity or NaN are removed.

sortByFitness :: [(Double, Individual)] -> [(Double, Individual)]

Source

Sort a set of individuals with fitness values by their fitness

Produced by Haddock version 2.6.1