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source: branches/HeuristicLab.DataImporter/HeuristicLab.DataImporter.Command/MissingValues/DeleteColumnsWithMissingValuesThresholdCommand.cs @ 12296

Last change on this file since 12296 was 9615, checked in by mkommend, 11 years ago

#1734: Updated copyright information in all DataImporter classes.

File size: 2.9 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.DataImporter.Command.View;
23using HeuristicLab.DataImporter.Data;
24using HeuristicLab.DataImporter.Data.CommandBase;
25using HeuristicLab.DataImporter.Data.Model;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.DataImporter.Command {
29  [StorableClass]
30  [ViewableCommandInfoAttribute("Delete Columns beneath Threshold", 1, ColumnGroupState.AnySelectedColumnContainsNull,
31    "Handle Missing Values", Position = 6, OptionsView = typeof(DeleteWithThresholdView))]
32  public class DeleteColumnsWithMissingValuesThresholdCommand : ColumnGroupCommandWithAffectedColumnsBase, IThresholdCommand {
33    private ColumnBase oldColumn;
34    private int oldColumnIndex;
35
36    [Storable]
37    private double threshold = 0.8;
38    public double Threshold { get { return threshold; } set { threshold = value; } }
39
40    [StorableConstructor]
41    protected DeleteColumnsWithMissingValuesThresholdCommand(bool deserializing) : base(deserializing) { }
42
43    public DeleteColumnsWithMissingValuesThresholdCommand(DataSet dataSet, string columnGroupName, int[] affectedColumns)
44      : base(dataSet, columnGroupName, affectedColumns) {
45    }
46
47    public override void Execute() {
48      base.Execute();
49
50      oldColumnIndex = AffectedColumns[0];
51
52      oldColumn = ColumnGroup.GetColumn(oldColumnIndex);
53      if ((double)oldColumn.NonNullValuesCount / (double)oldColumn.TotalValuesCount < Threshold) {
54        ColumnGroup.RemoveColumn(oldColumn);
55      } else {
56        oldColumn = null;
57      }
58
59      ColumnGroup.FireChanged();
60      ColumnGroup = null;
61    }
62
63    public override void UndoExecute() {
64      base.UndoExecute();
65      if (oldColumn != null) {
66        ColumnGroup.InsertColumn(oldColumnIndex, oldColumn);
67      }
68      oldColumn = null;
69      oldColumnIndex = -1;
70      ColumnGroup.FireChanged();
71      ColumnGroup = null;
72    }
73
74    public override string Description {
75      get { return "Delete columns with a missing value percentage beneath a certain threshold"; }
76    }
77  }
78}
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