source: branches/HeuristicLab.EvolutionaryTracking/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/SymbolicDataAnalysisSolutionPruningOptimizer.cs @ 9963

Last change on this file since 9963 was 9963, checked in by bburlacu, 8 years ago

#1772: Merged changes from the trunk and other branches. Added new ExtendedSymbolicExpressionTreeCanvas control for the visual exploration of tree genealogies. Reorganized some files and folders.

File size: 2.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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 HeuristicLab.Core;
23using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
24using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
25
26namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
27  [Item("SymbolicDataAnalysisSolutionPruningOptimizer", "An operator which automatically removes nodes that have a negative impact from the tree model, optimizing the remaining constants.")]
28  [StorableClass]
29  public abstract class SymbolicDataAnalysisSolutionPruningOptimizer {
30    public abstract ISymbolicDataAnalysisSolution PruneAndOptimizeSolution(ISymbolicDataAnalysisSolution solution);
31
32    protected ConstantTreeNode MakeConstantTreeNode(double value) {
33      var constant = new Constant { MinValue = value - 1, MaxValue = value + 1 };
34      var constantTreeNode = (ConstantTreeNode)constant.CreateTreeNode();
35      constantTreeNode.Value = value;
36      return constantTreeNode;
37    }
38
39    protected void ReplaceWithConstantNode(ISymbolicExpressionTreeNode originalNode, ISymbolicExpressionTreeNode constantNode) {
40      var parent = originalNode.Parent;
41      var index = parent.IndexOfSubtree(originalNode);
42      parent.RemoveSubtree(index);
43      parent.InsertSubtree(index, constantNode);
44    }
45  }
46}
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