[17647] | 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 | using System.Linq;
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| 4 | using HeuristicLab.Common;
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| 5 | using HeuristicLab.Random;
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| 6 |
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| 7 | namespace HeuristicLab.Problems.Instances.DataAnalysis {
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| 8 | public class Feynman20 : FeynmanDescriptor {
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| 9 | private readonly int testSamples;
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| 10 | private readonly int trainingSamples;
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| 11 |
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| 12 | public Feynman20() : this((int) DateTime.Now.Ticks, 10000, 10000, null) { }
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| 13 |
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| 14 | public Feynman20(int seed) {
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| 15 | Seed = seed;
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| 16 | trainingSamples = 10000;
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| 17 | testSamples = 10000;
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| 18 | noiseRatio = null;
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| 19 | }
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| 20 |
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| 21 | public Feynman20(int seed, int trainingSamples, int testSamples, double? noiseRatio) {
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| 22 | Seed = seed;
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| 23 | this.trainingSamples = trainingSamples;
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| 24 | this.testSamples = testSamples;
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| 25 | this.noiseRatio = noiseRatio;
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| 26 | }
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| 27 |
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| 28 | public override string Name {
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| 29 | get {
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[17805] | 30 | return string.Format("I.16.6 (u+v)/(1+u*v/c**2) | {0}",
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[17678] | 31 | noiseRatio == null ? "no noise" : string.Format(System.Globalization.CultureInfo.InvariantCulture, "noise={0:g}",noiseRatio));
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[17647] | 32 | }
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| 33 | }
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| 34 |
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| 35 | protected override string TargetVariable { get { return noiseRatio == null ? "v1" : "v1_noise"; } }
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| 36 |
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| 37 | protected override string[] VariableNames {
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[17973] | 38 | get { return noiseRatio == null ? new[] { "c", "v", "u", "v1" } : new[] { "c", "v", "u", "v1", "v1_noise" }; }
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[17647] | 39 | }
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| 40 |
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| 41 | protected override string[] AllowedInputVariables { get { return new[] {"c", "v", "u"}; } }
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| 42 |
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| 43 | public int Seed { get; private set; }
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| 44 |
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| 45 | protected override int TrainingPartitionStart { get { return 0; } }
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| 46 | protected override int TrainingPartitionEnd { get { return trainingSamples; } }
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| 47 | protected override int TestPartitionStart { get { return trainingSamples; } }
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| 48 | protected override int TestPartitionEnd { get { return trainingSamples + testSamples; } }
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| 49 |
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| 50 | protected override List<List<double>> GenerateValues() {
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| 51 | var rand = new MersenneTwister((uint) Seed);
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| 52 |
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| 53 | var data = new List<List<double>>();
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| 54 | var c = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
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| 55 | var v = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
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| 56 | var u = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
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| 57 |
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| 58 | var v1 = new List<double>();
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| 59 |
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| 60 | data.Add(c);
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| 61 | data.Add(v);
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| 62 | data.Add(u);
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| 63 | data.Add(v1);
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| 64 |
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| 65 | for (var i = 0; i < c.Count; i++) {
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| 66 | var res = (u[i] + v[i]) / (1 + u[i] * v[i] / Math.Pow(c[i], 2));
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| 67 | v1.Add(res);
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| 68 | }
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| 69 |
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[18032] | 70 | var targetNoise = ValueGenerator.GenerateNoise(v1, rand, noiseRatio);
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[17973] | 71 | if (targetNoise != null) data.Add(targetNoise);
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[17647] | 72 |
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| 73 | return data;
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| 74 | }
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| 75 | }
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| 76 | } |
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