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source: trunk/HeuristicLab.Algorithms.DataAnalysis/3.4/GAM/Spline1dModel.cs @ 17889

Last change on this file since 17889 was 17889, checked in by mkommend, 19 months ago

#2898: Minor changes in Spline1dModel (added field for inputVariable, and named model and solution more appropriately).

File size: 4.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using HEAL.Attic;
23using System.Collections.Generic;
24using System.Linq;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
27using HeuristicLab.Problems.DataAnalysis;
28using System;
29
30namespace HeuristicLab.Algorithms.DataAnalysis {
31  [Item("Spline model (1d)",
32    "Univariate spline model (wrapper for alglib.spline1dmodel)")]
33  [StorableType("23D71839-E011-4DC5-B451-2D4C1177D743")]
34  public sealed class Spline1dModel : RegressionModel {
35    // not storable! see persistence properties below
36    private alglib.spline1d.spline1dinterpolant interpolant;
37
38    [Storable(OldName = "variablesUsedForPrediction")]
39    private string[] StorableVariablesUsedForPrediction {
40      set {
41        if (value.Length > 1) throw new ArgumentException("A one-dimensional spline model supports only one input variable.");
42        inputVariable = value[0];
43      }
44    }
45
46    [Storable]
47    private string inputVariable;
48    public override IEnumerable<string> VariablesUsedForPrediction => new[] { inputVariable };
49
50    [StorableConstructor]
51    private Spline1dModel(StorableConstructorFlag deserializing) : base(deserializing) {
52      this.interpolant = new alglib.spline1d.spline1dinterpolant();
53    }
54
55    private Spline1dModel(Spline1dModel orig, Cloner cloner) : base(orig, cloner) {
56      this.inputVariable = orig.inputVariable;
57      this.interpolant = (alglib.spline1d.spline1dinterpolant)orig.interpolant.make_copy();
58    }
59    public Spline1dModel(alglib.spline1d.spline1dinterpolant interpolant, string targetVar, string inputVar)
60      : base(targetVar, $"Spline model ({inputVar})") {
61      this.interpolant = (alglib.spline1d.spline1dinterpolant)interpolant.make_copy();
62      this.inputVariable = inputVar;     
63    }
64
65
66    public override IDeepCloneable Clone(Cloner cloner) => new Spline1dModel(this, cloner);
67
68    public override IRegressionSolution CreateRegressionSolution(IRegressionProblemData problemData) {
69      var solution =  new RegressionSolution(this, (IRegressionProblemData)problemData.Clone());
70      solution.Name = $"Regression Spline ({inputVariable})";
71
72      return solution;
73    }
74
75    public double GetEstimatedValue(double x) => alglib.spline1d.spline1dcalc(interpolant, x);
76
77    public override IEnumerable<double> GetEstimatedValues(IDataset dataset, IEnumerable<int> rows) {
78      return dataset.GetDoubleValues(inputVariable, rows).Select(GetEstimatedValue);
79    }
80
81    #region persistence
82    [Storable]
83    private double[] Interpolant_c {
84      get { return interpolant.c; }
85      set { interpolant.c = value; }
86    }
87    [Storable]
88    private double[] Interpolant_x {
89      get { return interpolant.x; }
90      set { interpolant.x = value; }
91    }
92    [Storable]
93    private int Interpolant_continuity {
94      get { return interpolant.continuity; }
95      set { interpolant.continuity = value; }
96    }
97    [Storable]
98    private int Interpolant_k {
99      get { return interpolant.k; }
100      set { interpolant.k = value; }
101    }
102    [Storable]
103    private int Interpolant_n {
104      get { return interpolant.n; }
105      set { interpolant.n = value; }
106    }
107    [Storable]
108    private bool Interpolant_periodic {
109      get { return interpolant.periodic; }
110      set { interpolant.periodic = value; }
111    }
112    #endregion
113  }
114}
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