Uses of Class
ec.Fitness

Packages that use Fitness

Package	Description
ec
ec.eval
ec.gp.koza
ec.multiobjective
ec.multiobjective.nsga2
ec.multiobjective.spea2
ec.pso
ec.simple

Uses of Fitness in ec

Fields in ec declared as Fitness

Modifier and Type	Field and Description
Fitness	Species.f_prototype The prototypical fitness for individuals of this species.
Fitness	Individual.fitness The fitness of the Individual.

Methods in ec with parameters of type Fitness

Modifier and Type	Method and Description
abstract boolean	Fitness.betterThan(Fitness _fitness) Should return true if this fitness is clearly better than _fitness; You may assume that _fitness is of the same class as yourself.
boolean	Fitness.contextIsBetterThan(Fitness other) Given another Fitness, returns true if the trial which produced my current context is "better" in fitness than the trial which produced his current context, and thus should be retained in lieu of his.
abstract boolean	Fitness.equivalentTo(Fitness _fitness) Should return true if this fitness is in the same equivalence class as _fitness, that is, neither is clearly better or worse than the other.
void	Fitness.merge(EvolutionState state, Fitness other) Merges the other fitness into this fitness.
void	Fitness.setToBestOf(EvolutionState state, Fitness[] fitnesses) Sets the fitness to be the same value as the best of the provided fitnesses.
void	Fitness.setToMeanOf(EvolutionState state, Fitness[] fitnesses) Sets the fitness to be the same value as the mean of the provided fitnesses.
void	Fitness.setToMedianOf(EvolutionState state, Fitness[] fitnesses) Sets the fitness to be the median of the provided fitnesses.

Uses of Fitness in ec.eval

Methods in ec.eval with parameters of type Fitness

Modifier and Type	Method and Description
void	MetaProblem.combine(EvolutionState state, Fitness[] runs, Fitness finalFitness) Combines fitness results from multiple runs into a final Fitness.
void	MetaProblem.combine(EvolutionState state, Fitness[] runs, Fitness finalFitness) Combines fitness results from multiple runs into a final Fitness.

Uses of Fitness in ec.gp.koza

Subclasses of Fitness in ec.gp.koza

Modifier and Type	Class and Description
class	KozaFitness KozaFitness is a Fitness which stores an individual's fitness as described in Koza I.

Methods in ec.gp.koza with parameters of type Fitness

Modifier and Type	Method and Description
boolean	KozaFitness.betterThan(Fitness _fitness)
boolean	KozaFitness.equivalentTo(Fitness _fitness)
void	KozaFitness.setToMeanOf(EvolutionState state, Fitness[] fitnesses)

Uses of Fitness in ec.multiobjective

Subclasses of Fitness in ec.multiobjective

Modifier and Type	Class and Description
class	MultiObjectiveFitness MultiObjectiveFitness is a subclass of Fitness which implements basic multi-objective mechanisms suitable for being used with a variety of multi-objective selection mechanisms, including ones using pareto-optimality.

Methods in ec.multiobjective with parameters of type Fitness

Modifier and Type	Method and Description
boolean	MultiObjectiveFitness.betterThan(Fitness fitness) Returns true if I'm better than _fitness.
boolean	MultiObjectiveFitness.equivalentTo(Fitness _fitness) Returns true if I'm equivalent in fitness (neither better nor worse) to _fitness.
void	MultiObjectiveFitness.setToBestOf(EvolutionState state, Fitness[] fitnesses)
void	MultiObjectiveFitness.setToMeanOf(EvolutionState state, Fitness[] fitnesses)
void	MultiObjectiveFitness.setToMedianOf(EvolutionState state, Fitness[] fitnesses)

Uses of Fitness in ec.multiobjective.nsga2

Subclasses of Fitness in ec.multiobjective.nsga2

Modifier and Type	Class and Description
class	NSGA2MultiObjectiveFitness NSGA2MultiObjectiveFitness is a subclass of MultiObjeciveFitness which adds auxiliary fitness measures (sparsity, rank) largely used by MultiObjectiveStatistics.

Methods in ec.multiobjective.nsga2 with parameters of type Fitness

Modifier and Type	Method and Description
boolean	NSGA2MultiObjectiveFitness.betterThan(Fitness _fitness) We specify the tournament selection criteria, Rank (lower values are better) and Sparsity (higher values are better)
boolean	NSGA2MultiObjectiveFitness.equivalentTo(Fitness _fitness)

Uses of Fitness in ec.multiobjective.spea2

Subclasses of Fitness in ec.multiobjective.spea2

Modifier and Type	Class and Description
class	SPEA2MultiObjectiveFitness SPEA2MultiObjectiveFitness is a subclass of MultiObjectiveFitness which adds three auxiliary fitness measures used in SPEA2: strength S(i), kthNNDistance D(i), and a final fitness value R(i) + D(i).

Methods in ec.multiobjective.spea2 with parameters of type Fitness

Modifier and Type	Method and Description
boolean	SPEA2MultiObjectiveFitness.betterThan(Fitness _fitness) The selection criteria in SPEA2 uses the computed fitness, and not pareto dominance.
boolean	SPEA2MultiObjectiveFitness.equivalentTo(Fitness _fitness) The selection criteria in SPEA2 uses the computed fitness, and not pareto dominance.

Uses of Fitness in ec.pso

Fields in ec.pso declared as Fitness

Modifier and Type	Field and Description
Fitness[]	PSOBreeder.globalBestFitness
Fitness	Particle.neighborhoodBestFitness
Fitness	Particle.personalBestFitness

Uses of Fitness in ec.simple

Subclasses of Fitness in ec.simple

Modifier and Type	Class and Description
class	SimpleFitness A simple default fitness, consisting of a double floating-point value where fitness A is superior to fitness B if and only if A > B.

Methods in ec.simple with parameters of type Fitness

Modifier and Type	Method and Description
boolean	SimpleFitness.betterThan(Fitness _fitness)
boolean	SimpleFitness.equivalentTo(Fitness _fitness)
void	SimpleFitness.setToMeanOf(EvolutionState state, Fitness[] fitnesses)