source: branches/ALPS/HeuristicLab.Algorithms.ALPS/3.3/WeightingReducer.cs @ 13046

Last change on this file since 13046 was 13046, checked in by pfleck, 7 years ago

#2269

  • Changed the age type from int to double.
  • Changed EldersSelector to make use of a ScopeTreeLookupParameter.
  • Removed unused operators in LayerUpdator.
File size: 3.3 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.Linq;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Operators;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.Algorithms.ALPS {
32  [Item("WeightingReducer", "An operator that combines two values based on the weight of the lower (0.0) and higher (1.0) value.")]
33  [StorableClass]
34  public sealed class WeightingReducer : SingleSuccessorOperator {
35
36    public IScopeTreeLookupParameter<DoubleValue> ParameterToReduce {
37      get { return (IScopeTreeLookupParameter<DoubleValue>)Parameters["ParameterToReduce"]; }
38    }
39    public ILookupParameter<DoubleValue> TargetParameter {
40      get { return (ILookupParameter<DoubleValue>)Parameters["TargetParameter"]; }
41    }
42    public IValueLookupParameter<DoubleValue> WeightParameter {
43      get { return (IValueLookupParameter<DoubleValue>)Parameters["Weight"]; }
44    }
45
46    [StorableConstructor]
47    private WeightingReducer(bool deserializing) : base(deserializing) { }
48    private WeightingReducer(WeightingReducer original, Cloner cloner)
49      : base(original, cloner) {
50    }
51    public override IDeepCloneable Clone(Cloner cloner) {
52      return new WeightingReducer(this, cloner);
53    }
54    public WeightingReducer()
55      : base() {
56      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("ParameterToReduce", "The parameter on which the weighting should be applied."));
57      Parameters.Add(new LookupParameter<DoubleValue>("TargetParameter", "The target variable in which the weighted value should be stored."));
58      Parameters.Add(new ValueLookupParameter<DoubleValue>("Weight", "Weight of the two values (0.0 for the smaller, 1.0 for the larger)."));
59    }
60
61    public override IOperation Apply() {
62      var values = ParameterToReduce.ActualValue;
63      if (values.Length != 2)
64        throw new InvalidOperationException("Weighting between values can only done for two values.");
65
66      double weight = WeightParameter.ActualValue.Value;
67
68      double max = values.Max(v => v.Value);
69      double min = values.Min(v => v.Value);
70
71      double result = max * weight + min * (1 - weight);
72
73      if (TargetParameter.ActualValue == null)
74        TargetParameter.ActualValue = new DoubleValue(result);
75      else TargetParameter.ActualValue.Value = result;
76
77      return base.Apply();
78    }
79
80  }
81}
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