E:/Projects/Visual Studio/CSharp/GEP .NET Framework/GEP.Core/Float/MatingProbabilityFunctions/DirectFitnessToProbability.cs

Go to the documentation of this file.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace GEP.Core.Float.MatingProbabilityFunctions
{
    [Serializable]
    public class DirectFitnessToProbability : MatingProbabilityFunction
    {
        public DirectFitnessToProbability(bool fitnessCloserToZeroIsBetter)
            : base(fitnessCloserToZeroIsBetter) { }

        public override void SetMatingProbability(Common.Population population)
        {
            Population fPopulation = (Population)population;
            fPopulation._totalMatingProbability = 0;
            double minFitness = double.MaxValue;
            double maxFitness = double.MinValue;
            double fitness;
            for (int i = 0; i < fPopulation.Size; i++)
            {
                fitness = fPopulation[i]._fitness;
                if (double.IsNaN(fitness) || double.IsInfinity(fitness))
                {
                    if (_fitnessCloserToZeroIsBetter)
                    {
                        fPopulation[i]._fitness = double.MaxValue;
                        fitness = double.MaxValue;
                    }
                    else
                    {
                        fPopulation[i]._fitness = 0;
                        fitness = 0;
                    }
                }
                else
                {
                    if (fitness < minFitness)
                        minFitness = fitness;
                    if (maxFitness < fitness)
                        maxFitness = fitness;
                    if (!_fitnessCloserToZeroIsBetter)
                    {
                        fPopulation._totalMatingProbability += fitness;
                        fPopulation[i]._matingProbability = fitness;
                    }
                }
            }
            double doubleMidFitness = minFitness + maxFitness;
            if (_fitnessCloserToZeroIsBetter)
            {
                for (int i = 0; i < fPopulation.Size; i++)
                {
                    if (fPopulation[i]._fitness == double.MaxValue)
                        fPopulation[i]._matingProbability = 0;
                    else
                    {
                        fPopulation[i]._matingProbability = doubleMidFitness - fPopulation[i]._fitness;
                        fPopulation._totalMatingProbability += fPopulation[i]._matingProbability;
                    }
                }
            }
        }
    }
}

GEP .NET Framwork Main Page