source: branches/HeuristicLab.DataImporter/HeuristicLab.DataImporter.Command/MissingValues/DeleteRowsWithMissingValuesThresholdCommand.cs @ 8586

Last change on this file since 8586 was 8586, checked in by sforsten, 7 years ago

#1867: renamed view DeleteWithThreshold to DeleteWithThresholdView

File size: 3.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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.DataImporter.Command.View;
26using HeuristicLab.DataImporter.Data;
27using HeuristicLab.DataImporter.Data.CommandBase;
28using HeuristicLab.DataImporter.Data.Model;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.DataImporter.Command {
32  [StorableClass]
33  [ViewableCommandInfoAttribute("Delete Rows beneath Threshold", 1, ColumnGroupState.Active,
34    "Handle Missing Values", Position = 5, OptionsView = typeof(DeleteWithThresholdView))]
35  public class DeleteRowsWithMissingValuesThresholdCommand : ColumnGroupCommandBase, IThresholdCommand {
36    private Dictionary<int, IComparable[]> deletedRows;
37
38    [Storable]
39    private double threshold = 0.8;
40    public double Threshold { get { return threshold; } set { threshold = value; } }
41
42    private DeleteRowsWithMissingValuesThresholdCommand()
43      : base(null, string.Empty) {
44      deletedRows = new Dictionary<int, IComparable[]>();
45    }
46
47    public DeleteRowsWithMissingValuesThresholdCommand(DataSet dataSet, string columnGroupName)
48      : base(dataSet, columnGroupName) {
49      deletedRows = new Dictionary<int, IComparable[]>();
50    }
51
52    public override void Execute() {
53      base.Execute();
54      IComparable[] row;
55
56      double columnsCount = ColumnGroup.Columns.Count();
57      for (int rowInd = 0; rowInd < ColumnGroup.RowCount; rowInd++) {
58        row = ColumnGroup.GetRow(rowInd);
59        double setValues = ColumnGroup.GetRow(rowInd).Where(x => x != null).Count();
60        if (setValues / columnsCount < Threshold) {
61          deletedRows[rowInd] = row;
62        }
63      }
64
65      foreach (int rowInd in deletedRows.Select(x => x.Key).Reverse()) {
66        ColumnGroup.DeleteRow(rowInd);
67      }
68
69      ColumnGroup.FireChanged();
70      ColumnGroup = null;
71    }
72
73    public override void UndoExecute() {
74      base.UndoExecute();
75      foreach (KeyValuePair<int, IComparable[]> pair in deletedRows) {
76        ColumnGroup.InsertRow(pair.Key, pair.Value);
77      }
78      deletedRows.Clear();
79      ColumnGroup.FireChanged();
80      ColumnGroup = null;
81    }
82
83    public override string Description {
84      get { return "Delete rows with a missing value percentage beneath a certain threshold"; }
85    }
86  }
87}
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