C# Class SwarmOps.Problem

Base-class for an optimization problem.

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Public Methods

Method	Description
BeginOptimizationRun ( ) : void	Called at the beginning of an optimization run.
Continue ( int iterations, double fitness, bool feasible ) : bool	Return whether optimization is allowed to continue.
EndOptimizationRun ( ) : void	Called at the end of an optimization run.
EnforceConstraints ( double &parameters ) : bool	Enforce constraints and evaluate feasiblity. If you do not wish to enforce constraints you should make this call Feasible().
Feasible ( double parameters ) : bool	Evaluate feasibility (constraint satisfaction).
Fitness ( double parameters ) : double	Compute and return fitness for the given parameters.
Fitness ( double parameters, bool feasible ) : double	Compute and return fitness for the given parameters.
Fitness ( double parameters, double fitnessLimit ) : double	Compute and return fitness for the given parameters. The fitness evaluation is aborted preemptively, if the fitness becomes higher (i.e. worse) than fitnessLimit, and if it is not possible for the fitness to improve.
Fitness ( double parameters, double fitnessLimit, bool oldFeasible, bool newFeasible ) : double	Compute and return fitness for the given parameters. The fitness evaluation is aborted preemptively if feasibility of the new candidate solution is same or better as that of the old candidate solution, and if the fitness becomes higher (i.e. worse) than fitnessLimit and if it is not possible for the fitness to improve.
Gradient ( double x, double &v ) : int	Compute the gradient of the fitness-function.
Problem ( ) : System	Create the object.
Problem ( int maxIterations ) : System	Create the object.
Problem ( int maxIterations, bool requireFeasible ) : System	Create the object.

Method Details

BeginOptimizationRun() public method

Called at the beginning of an optimization run.

public BeginOptimizationRun ( ) : void
return	void

Continue() public method

Return whether optimization is allowed to continue.

public Continue ( int iterations, double fitness, bool feasible ) : bool
iterations	int	Number of iterations performed in optimization run.
fitness	double	Best fitness found in optimization run.
feasible	bool	Feasibility of best found candidate solution.
return	bool

EndOptimizationRun() public method

Called at the end of an optimization run.

public EndOptimizationRun ( ) : void
return	void

EnforceConstraints() public method

Enforce constraints and evaluate feasiblity.

If you do not wish to enforce constraints you should make this call Feasible().

public EnforceConstraints ( double &parameters ) : bool
parameters	double	Candidate solution.
return	bool

Feasible() public method

Evaluate feasibility (constraint satisfaction).

public Feasible ( double parameters ) : bool
parameters	double	Candidate solution.
return	bool

Fitness() public method

Compute and return fitness for the given parameters.

public Fitness ( double parameters ) : double
parameters	double	Candidate solution.
return	double

Fitness() public method

Compute and return fitness for the given parameters.

public Fitness ( double parameters, bool feasible ) : double
parameters	double	Candidate solution.
feasible	bool	Feasibility of candidate solution.
return	double

Fitness() public method

Compute and return fitness for the given parameters. The fitness evaluation is aborted preemptively, if the fitness becomes higher (i.e. worse) than fitnessLimit, and if it is not possible for the fitness to improve.

public Fitness ( double parameters, double fitnessLimit ) : double
parameters	double	Candidate solution.
fitnessLimit	double	Preemptive Fitness Limit.
return	double

Fitness() public method

Compute and return fitness for the given parameters. The fitness evaluation is aborted preemptively if feasibility of the new candidate solution is same or better as that of the old candidate solution, and if the fitness becomes higher (i.e. worse) than fitnessLimit and if it is not possible for the fitness to improve.

public Fitness ( double parameters, double fitnessLimit, bool oldFeasible, bool newFeasible ) : double
parameters	double	Candidate solution.
fitnessLimit	double	Preemptive Fitness Limit.
oldFeasible	bool	Feasibility of new candidate solution.
newFeasible	bool	Feasibility of old candidate solution.
return	double

Gradient() public method

Compute the gradient of the fitness-function.

public Gradient ( double x, double &v ) : int
x	double	Candidate solution.
v	double	Array for holding the gradient.
return	int

Problem() public method

Create the object.

public Problem ( ) : System
return	System

Problem() public method

Create the object.

public Problem ( int maxIterations ) : System
maxIterations	int	Max optimization iterations to perform.
return	System

Problem() public method

Create the object.

public Problem ( int maxIterations, bool requireFeasible ) : System
maxIterations	int	Max optimization iterations to perform.
requireFeasible	bool	Require solution to be feasible (satisfy constraints.)
return	System