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source: trunk/sources/HeuristicLab.Problems.DataAnalysis/3.4/Dataset.cs @ 12509

Last change on this file since 12509 was 12509, checked in by mkommend, 9 years ago

#2276: Reintegrated branch for dataset refactoring.

File size: 10.4 KB
RevLine 
[2]1#region License Information
2/* HeuristicLab
[12012]3 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[2]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;
[6740]23using System.Collections;
[2]24using System.Collections.Generic;
[6740]25using System.Collections.ObjectModel;
[2285]26using System.Linq;
[3376]27using HeuristicLab.Common;
[3253]28using HeuristicLab.Core;
[4068]29using HeuristicLab.Data;
[3253]30using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
[2]31
[3253]32namespace HeuristicLab.Problems.DataAnalysis {
33  [Item("Dataset", "Represents a dataset containing data that should be analyzed.")]
34  [StorableClass]
[12509]35  public class Dataset : NamedItem, IDataset {
[3933]36    [StorableConstructor]
[12509]37    protected Dataset(bool deserializing) : base(deserializing) { }
38    protected Dataset(Dataset original, Cloner cloner)
[4722]39      : base(original, cloner) {
[6740]40      variableValues = new Dictionary<string, IList>(original.variableValues);
41      variableNames = new List<string>(original.variableNames);
42      rows = original.rows;
[2319]43    }
[6740]44    public override IDeepCloneable Clone(Cloner cloner) { return new Dataset(this, cloner); }
[5552]45
[5847]46    public Dataset()
47      : base() {
48      Name = "-";
49      VariableNames = Enumerable.Empty<string>();
[6740]50      variableValues = new Dictionary<string, IList>();
51      rows = 0;
[5847]52    }
53
[6740]54    public Dataset(IEnumerable<string> variableNames, IEnumerable<IList> variableValues)
[3933]55      : base() {
[2319]56      Name = "-";
[6740]57      if (!variableNames.Any()) {
58        this.variableNames = Enumerable.Range(0, variableValues.Count()).Select(x => "Column " + x).ToList();
59      } else if (variableNames.Count() != variableValues.Count()) {
60        throw new ArgumentException("Number of variable names doesn't match the number of columns of variableValues");
61      } else if (!variableValues.All(list => list.Count == variableValues.First().Count)) {
62        throw new ArgumentException("The number of values must be equal for every variable");
63      } else if (variableNames.Distinct().Count() != variableNames.Count()) {
64        var duplicateVariableNames =
65          variableNames.GroupBy(v => v).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
66        string message = "The dataset cannot contain duplicate variables names: " + Environment.NewLine;
67        foreach (var duplicateVariableName in duplicateVariableNames)
68          message += duplicateVariableName + Environment.NewLine;
69        throw new ArgumentException(message);
[3264]70      }
[6740]71
72      rows = variableValues.First().Count;
73      this.variableNames = new List<string>(variableNames);
[7736]74      this.variableValues = new Dictionary<string, IList>(this.variableNames.Count);
[6740]75      for (int i = 0; i < this.variableNames.Count; i++) {
76        var values = variableValues.ElementAt(i);
77        IList clonedValues = null;
[10406]78        if (values is IList<double>)
[6740]79          clonedValues = new List<double>(values.Cast<double>());
[10406]80        else if (values is IList<string>)
[6740]81          clonedValues = new List<string>(values.Cast<string>());
[10406]82        else if (values is IList<DateTime>)
[6740]83          clonedValues = new List<DateTime>(values.Cast<DateTime>());
84        else {
85          this.variableNames = new List<string>();
86          this.variableValues = new Dictionary<string, IList>();
[10406]87          throw new ArgumentException("The variable values must be of type IList<double>, IList<string> or IList<DateTime>");
[6740]88        }
89        this.variableValues.Add(this.variableNames[i], clonedValues);
90      }
[2038]91    }
92
[6740]93    public Dataset(IEnumerable<string> variableNames, double[,] variableValues) {
94      Name = "-";
95      if (variableNames.Count() != variableValues.GetLength(1)) {
96        throw new ArgumentException("Number of variable names doesn't match the number of columns of variableValues");
97      }
98      if (variableNames.Distinct().Count() != variableNames.Count()) {
99        var duplicateVariableNames = variableNames.GroupBy(v => v).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
100        string message = "The dataset cannot contain duplicate variables names: " + Environment.NewLine;
101        foreach (var duplicateVariableName in duplicateVariableNames)
102          message += duplicateVariableName + Environment.NewLine;
103        throw new ArgumentException(message);
104      }
[5552]105
[6740]106      rows = variableValues.GetLength(0);
107      this.variableNames = new List<string>(variableNames);
108
[7736]109      this.variableValues = new Dictionary<string, IList>(variableValues.GetLength(1));
[6740]110      for (int col = 0; col < variableValues.GetLength(1); col++) {
111        string columName = this.variableNames[col];
[7736]112        var values = new List<double>(variableValues.GetLength(0));
[6740]113        for (int row = 0; row < variableValues.GetLength(0); row++) {
114          values.Add(variableValues[row, col]);
[5552]115        }
[6740]116        this.variableValues.Add(columName, values);
[5552]117      }
[333]118    }
119
[12509]120    protected Dataset(Dataset dataset) : this(dataset.variableNames, dataset.variableValues.Values) { }
121
[6740]122    #region Backwards compatible code, remove with 3.5
123    private double[,] storableData;
124    //name alias used to suppport backwards compatibility
125    [Storable(Name = "data", AllowOneWay = true)]
126    private double[,] StorableData { set { storableData = value; } }
[2]127
[6740]128    [StorableHook(HookType.AfterDeserialization)]
129    private void AfterDeserialization() {
130      if (variableValues == null) {
131        rows = storableData.GetLength(0);
132        variableValues = new Dictionary<string, IList>();
133        for (int col = 0; col < storableData.GetLength(1); col++) {
134          string columName = variableNames[col];
[7921]135          var values = new List<double>(rows);
136          for (int row = 0; row < rows; row++) {
[6740]137            values.Add(storableData[row, col]);
138          }
139          variableValues.Add(columName, values);
140        }
141        storableData = null;
[3839]142      }
143    }
[6740]144    #endregion
[3933]145
[6749]146    [Storable(Name = "VariableValues")]
[12509]147    protected Dictionary<string, IList> variableValues;
[6749]148
[12509]149    protected List<string> variableNames;
[6740]150    [Storable]
151    public IEnumerable<string> VariableNames {
152      get { return variableNames; }
[12509]153      protected set {
[6740]154        if (variableNames != null) throw new InvalidOperationException();
155        variableNames = new List<string>(value);
156      }
[1287]157    }
[6740]158    public IEnumerable<string> DoubleVariables {
159      get { return variableValues.Where(p => p.Value is List<double>).Select(p => p.Key); }
[3994]160    }
[6740]161    public IEnumerable<double> GetDoubleValues(string variableName) {
[12509]162      return GetValues<double>(variableName);
[3994]163    }
[11114]164    public IEnumerable<string> GetStringValues(string variableName) {
[12509]165      return GetValues<string>(variableName);
[11114]166    }
167    public IEnumerable<DateTime> GetDateTimeValues(string variableName) {
[12509]168      return GetValues<DateTime>(variableName);
[11114]169    }
170
[6740]171    public ReadOnlyCollection<double> GetReadOnlyDoubleValues(string variableName) {
[12509]172      var values = GetValues<double>(variableName);
[6740]173      return values.AsReadOnly();
[3994]174    }
[6740]175    public double GetDoubleValue(string variableName, int row) {
[12509]176      var values = GetValues<double>(variableName);
[6740]177      return values[row];
[4031]178    }
[6740]179    public IEnumerable<double> GetDoubleValues(string variableName, IEnumerable<int> rows) {
[12509]180      return GetValues<double>(variableName, rows);
181    }
182    private IEnumerable<T> GetValues<T>(string variableName, IEnumerable<int> rows) {
183      var values = GetValues<T>(variableName);
184      return rows.Select(x => values[x]);
185    }
186    private List<T> GetValues<T>(string variableName) {
[6740]187      IList list;
188      if (!variableValues.TryGetValue(variableName, out list))
189        throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
[12509]190      List<T> values = list as List<T>;
191      if (values == null) throw new ArgumentException("The variable " + variableName + " is not a " + typeof(T) + " variable.");
192      return values;
[2319]193    }
[11156]194    public bool VariableHasType<T>(string variableName) {
[11114]195      return variableValues[variableName] is IList<T>;
196    }
197
[3253]198    #region IStringConvertibleMatrix Members
[6740]199    [Storable]
[12509]200    protected int rows;
[3253]201    public int Rows {
[6740]202      get { return rows; }
[3933]203      set { throw new NotSupportedException(); }
[2]204    }
[3253]205    public int Columns {
[6740]206      get { return variableNames.Count; }
[3933]207      set { throw new NotSupportedException(); }
[2]208    }
[3321]209    public bool SortableView {
[3933]210      get { return false; }
211      set { throw new NotSupportedException(); }
[3321]212    }
[3430]213    public bool ReadOnly {
[3933]214      get { return true; }
[3430]215    }
[3308]216    IEnumerable<string> IStringConvertibleMatrix.ColumnNames {
217      get { return this.VariableNames; }
[3933]218      set { throw new NotSupportedException(); }
[3308]219    }
[3311]220    IEnumerable<string> IStringConvertibleMatrix.RowNames {
[5552]221      get { return Enumerable.Empty<string>(); }
[3933]222      set { throw new NotSupportedException(); }
[3311]223    }
[3253]224    public string GetValue(int rowIndex, int columnIndex) {
[6740]225      return variableValues[variableNames[columnIndex]][rowIndex].ToString();
[2]226    }
[12509]227    bool IStringConvertibleMatrix.SetValue(string value, int rowIndex, int columnIndex) {
[3933]228      throw new NotSupportedException();
[237]229    }
[12509]230    bool IStringConvertibleMatrix.Validate(string value, out string errorMessage) {
[5552]231      throw new NotSupportedException();
232    }
[237]233
[12509]234    public virtual event EventHandler ColumnsChanged { add { } remove { } }
235    public virtual event EventHandler RowsChanged { add { } remove { } }
236    public virtual event EventHandler ColumnNamesChanged { add { } remove { } }
237    public virtual event EventHandler RowNamesChanged { add { } remove { } }
238    public virtual event EventHandler SortableViewChanged { add { } remove { } }
239    public virtual event EventHandler<EventArgs<int, int>> ItemChanged { add { } remove { } }
240    public virtual event EventHandler Reset { add { } remove { } }
[2012]241    #endregion
[2]242  }
243}
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