protected AbstractFitnessFunction(FunctionParameters functionParams)
{
Dimension = functionParams.Dimension;
Coefficients = new double[Dimension];
functionParams.Coefficients.CopyTo(Coefficients, 0);
_optimization = PsoServiceLocator.Instance.GetService <IOptimization <double[]> >();
EvaluationsCount = 0;
}
public static IFitnessFunction <double[], double[]> GetFitnessFunction(FunctionParameters parameters)
{
if (functionCache.ContainsKey(parameters.FitnessFunctionType))
{
return(functionCache[parameters.FitnessFunctionType]);
}
if (parameters.FitnessFunctionType.Contains("bbob"))
{
var functionId = parameters.FitnessFunctionType;
Problem problem;
/* Iterate over all problems in the suite */
restartBbob(parameters.Dimension);
while ((problem = benchmark.getNextProblem()) != null)
{
if (problem.Id != functionId)
{
continue;
}
var upper = problem.getLargestValuesOfInterest();
var bounds =
problem.getSmallestValuesOfInterest()
.Select((x, i) => new DimensionBound(x, upper[i]))
.ToArray();
parameters.SearchSpace = bounds;
var function = new FitnessFunction(problem.evaluateFunction);
return(function);
}
}
switch (parameters.FitnessFunctionType)
{
case "quadratic":
return(new QuadraticFunction(parameters));
case "rastrigin":
return(new RastriginFunction(parameters));
case "rosenbrock":
return(new RosenbrockFunction(parameters));
default:
throw new ArgumentException("Unknown function type.");
}
}
public RastriginFunction(FunctionParameters functionParams)
: base(functionParams)
{
}
public QuadraticFunction(FunctionParameters functionParams)
: base(functionParams)
{
}
public RosenbrockFunction(FunctionParameters functionParams)
: base(functionParams)
{
}
