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source: branches/3087_Ceres_Integration/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Feynman/Feynman22.cs @ 18006

Last change on this file since 18006 was 18006, checked in by gkronber, 3 years ago

#3087: merged r17784:18004 from trunk to branch to prepare for trunk reintegration (fixed a conflict in CrossValidation.cs)

File size: 2.7 KB
Line 
1using System;
2using System.Collections.Generic;
3using System.Linq;
4using HeuristicLab.Common;
5using HeuristicLab.Random;
6
7namespace HeuristicLab.Problems.Instances.DataAnalysis {
8  public class Feynman22 : FeynmanDescriptor {
9    private readonly int testSamples;
10    private readonly int trainingSamples;
11
12    public Feynman22() : this((int) DateTime.Now.Ticks, 10000, 10000, null) { }
13
14    public Feynman22(int seed) {
15      Seed            = seed;
16      trainingSamples = 10000;
17      testSamples     = 10000;
18      noiseRatio      = null;
19    }
20
21    public Feynman22(int seed, int trainingSamples, int testSamples, double? noiseRatio) {
22      Seed                 = seed;
23      this.trainingSamples = trainingSamples;
24      this.testSamples     = testSamples;
25      this.noiseRatio      = noiseRatio;
26    }
27
28    public override string Name {
29      get {
30        return string.Format("I.18.12 r*F*sin(theta) | {0}",
31          noiseRatio == null ? "no noise" : string.Format(System.Globalization.CultureInfo.InvariantCulture, "noise={0:g}",noiseRatio));
32      }
33    }
34
35    protected override string TargetVariable { get { return noiseRatio == null ? "tau" : "tau_noise"; } }
36
37    protected override string[] VariableNames {
38      get { return noiseRatio == null ? new[] { "r", "F", "theta", "tau" } : new[] { "r", "F", "theta", "tau", "tau_noise" }; }
39    }
40
41    protected override string[] AllowedInputVariables { get { return new[] {"r", "F", "theta"}; } }
42
43    public int Seed { get; private set; }
44
45    protected override int TrainingPartitionStart { get { return 0; } }
46    protected override int TrainingPartitionEnd { get { return trainingSamples; } }
47    protected override int TestPartitionStart { get { return trainingSamples; } }
48    protected override int TestPartitionEnd { get { return trainingSamples + testSamples; } }
49
50    protected override List<List<double>> GenerateValues() {
51      var rand = new MersenneTwister((uint) Seed);
52
53      var data  = new List<List<double>>();
54      var r     = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
55      var F     = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
56      var theta = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 0, 5).ToList();
57
58      var tau = new List<double>();
59
60      data.Add(r);
61      data.Add(F);
62      data.Add(theta);
63      data.Add(tau);
64
65      for (var i = 0; i < r.Count; i++) {
66        var res = r[i] * F[i] * Math.Sin(theta[i]);
67        tau.Add(res);
68      }
69
70      var targetNoise = GetNoisyTarget(tau, rand);
71      if (targetNoise != null) data.Add(targetNoise);
72
73      return data;
74    }
75  }
76}
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