source: trunk/sources/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Regression/ConstantModel.cs @ 13100

Last change on this file since 13100 was 13100, checked in by gkronber, 6 years ago

#1998: merged changes from the branch to trunk (btw. this branch was difficult to merge back to trunk because of it's specific structure)

File size: 4.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 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 System;
23using System.Collections.Generic;
24using System.Linq;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
27using HeuristicLab.Data;
28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29
30namespace HeuristicLab.Problems.DataAnalysis {
31  [StorableClass]
32  [Item("Constant Model", "A model that always returns the same constant value regardless of the presented input data.")]
33  public class ConstantModel : NamedItem, IRegressionModel, IClassificationModel, ITimeSeriesPrognosisModel, IStringConvertibleValue {
34    [Storable]
35    private double constant;
36    public double Constant {
37      get { return constant; }
38      // setter not implemented because manipulation of the constant is not allowed
39    }
40
41    [StorableConstructor]
42    protected ConstantModel(bool deserializing) : base(deserializing) { }
43    protected ConstantModel(ConstantModel original, Cloner cloner)
44      : base(original, cloner) {
45      this.constant = original.constant;
46    }
47    public override IDeepCloneable Clone(Cloner cloner) { return new ConstantModel(this, cloner); }
48
49    public ConstantModel(double constant)
50      : base() {
51      this.name = ItemName;
52      this.description = ItemDescription;
53      this.constant = constant;
54      this.ReadOnly = true; // changing a constant regression model is not supported
55    }
56
57    public IEnumerable<double> GetEstimatedValues(IDataset dataset, IEnumerable<int> rows) {
58      return rows.Select(row => Constant);
59    }
60    public IEnumerable<double> GetEstimatedClassValues(IDataset dataset, IEnumerable<int> rows) {
61      return GetEstimatedValues(dataset, rows);
62    }
63    public IEnumerable<IEnumerable<double>> GetPrognosedValues(IDataset dataset, IEnumerable<int> rows, IEnumerable<int> horizons) {
64      return rows.Select(_ => horizons.Select(__ => Constant));
65    }
66
67    public IRegressionSolution CreateRegressionSolution(IRegressionProblemData problemData) {
68      return new ConstantRegressionSolution(this, new RegressionProblemData(problemData));
69    }
70    public IClassificationSolution CreateClassificationSolution(IClassificationProblemData problemData) {
71      return new ConstantClassificationSolution(this, new ClassificationProblemData(problemData));
72    }
73    public ITimeSeriesPrognosisSolution CreateTimeSeriesPrognosisSolution(ITimeSeriesPrognosisProblemData problemData) {
74      return new TimeSeriesPrognosisSolution(this, new TimeSeriesPrognosisProblemData(problemData));
75    }
76
77    public override string ToString() {
78      return string.Format("Constant: {0}", GetValue());
79    }
80
81    #region IStringConvertibleValue
82    public bool ReadOnly { get; private set; }
83    public bool Validate(string value, out string errorMessage) {
84      throw new NotSupportedException(); // changing a constant regression model is not supported
85    }
86
87    public string GetValue() {
88      return string.Format("{0:E4}", constant);
89    }
90
91    public bool SetValue(string value) {
92      throw new NotSupportedException(); // changing a constant regression model is not supported
93    }
94
95    public event EventHandler ValueChanged;
96    #endregion
97
98  }
99}
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