source: branches/3040_VectorBasedGP/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/VectorData/AzzaliKorns5.cs @ 17741

#region License Information
/* HeuristicLab
 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Problems.DataAnalysis;
using HeuristicLab.Random;
using MathNet.Numerics.Statistics;
using DoubleVector = MathNet.Numerics.LinearAlgebra.Vector<double>;

namespace HeuristicLab.Problems.Instances.DataAnalysis {
  public class AzzaliKorns5 : ArtificialRegressionDataDescriptor {
    public override string Name { get { return "Azzali Korns5 K5 = 3.0 + 2.23 * log(X4)"; } }
    public override string Description { get { return "I. Azzali, L. Vanneschi, S. Silva, I. Bakurov, and M. Giacobini, “A Vectorial Approach to Genetic Programming,” EuroGP, pp. 213–227, 2019."; } }

    protected override string TargetVariable { get { return "K5"; } }
    protected override string[] VariableNames { get { return AllowedInputVariables.Concat(new[] { TargetVariable }).ToArray(); } }
    protected override string[] AllowedInputVariables { get { return new string[] { "X1", "X2", "X3", "X4" }; } }
    protected override int TrainingPartitionStart { get { return 0; } }
    protected override int TrainingPartitionEnd { get { return 70; } }
    protected override int TestPartitionStart { get { return 70; } }
    protected override int TestPartitionEnd { get { return 100; } }

    public int Seed { get; private set; }

    public AzzaliKorns5()
      : this((int)DateTime.Now.Ticks) { }
    public AzzaliKorns5(int seed)
      : base() {
      Seed = seed;
    }


    protected override List<List<double>> GenerateValues() { return null; }
    protected override List<IList> GenerateValuesExtended() {
      var rand = new MersenneTwister((uint)Seed);

      var x1Column = new List<double>(100);
      var x2Column = new List<double>(100);
      var x3Column = new List<double>(100);
      var x4Column = new List<DoubleVector>(100);
      var k5Column = new List<DoubleVector>(100);

      for (int i = 0; i < 100; i++) {
        var x1 = rand.NextDouble(-50, +50);
        var x2 = rand.NextDouble(-50, +50);
        var x3 = rand.NextDouble(-50, +50);
        var x4 = rand.NextDoubleVector(-50, +50, 10);

        var k5 = 3 + 2.13 * x4.PointwiseLog();

        x1Column.Add(x1);
        x2Column.Add(x2);
        x3Column.Add(x3);
        x4Column.Add(x4);
        k5Column.Add(k5);
      }

      return new List<IList> { x1Column, x2Column, x3Column, x4Column, k5Column };
    }
  }
}