1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections;
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24 | using System.Collections.Generic;
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25 | using System.Collections.ObjectModel;
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26 | using System.Linq;
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27 | using HEAL.Attic;
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28 | using HeuristicLab.Common;
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29 | using HeuristicLab.Core;
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30 | using HeuristicLab.Data;
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31 |
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32 | namespace HeuristicLab.Problems.DataAnalysis {
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33 | [Item("Dataset", "Represents a dataset containing data that should be analyzed.")]
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34 | [StorableType("49F4D145-50D7-4497-8D8A-D190CD556CC8")]
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35 | public class Dataset : NamedItem, IDataset {
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36 | [StorableConstructor]
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37 | protected Dataset(StorableConstructorFlag _) : base(_) { }
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38 | protected Dataset(Dataset original, Cloner cloner)
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39 | : base(original, cloner) {
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40 | // no need to clone the variable values because these can't be modified
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41 | variableValues = new Dictionary<string, IList>(original.variableValues);
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42 | variableNames = new List<string>(original.variableNames);
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43 | rows = original.rows;
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44 | }
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45 |
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46 | public override IDeepCloneable Clone(Cloner cloner) { return new Dataset(this, cloner); }
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47 |
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48 | public Dataset()
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49 | : base() {
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50 | Name = "-";
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51 | VariableNames = Enumerable.Empty<string>();
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52 | variableValues = new Dictionary<string, IList>();
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53 | rows = 0;
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54 | }
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55 |
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56 | /// <summary>
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57 | /// Creates a new dataset. The variableValues are not cloned.
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58 | /// </summary>
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59 | /// <param name="variableNames">The names of the variables in the dataset</param>
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60 | /// <param name="variableValues">The values for the variables (column-oriented storage). Values are not cloned!</param>
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61 | public Dataset(IEnumerable<string> variableNames, IEnumerable<IList> variableValues)
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62 | : this(variableNames, variableValues, cloneValues: true) {
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63 | }
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64 |
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65 | protected Dataset(IEnumerable<string> variableNames, IEnumerable<IList> variableValues, bool cloneValues = false) {
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66 | Name = "-";
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67 |
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68 | if (variableNames.Any()) {
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69 | this.variableNames = new List<string>(variableNames);
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70 | } else {
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71 | this.variableNames = Enumerable.Range(0, variableValues.Count()).Select(x => "Column " + x).ToList();
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72 | }
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73 | // check if the arguments are consistent (no duplicate variables, same number of rows, correct data types, ...)
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74 | CheckArguments(this.variableNames, variableValues);
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75 |
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76 | rows = variableValues.First().Count;
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77 |
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78 | if (cloneValues) {
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79 | this.variableValues = CloneValues(this.variableNames, variableValues);
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80 | } else {
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81 | this.variableValues = new Dictionary<string, IList>(this.variableNames.Count);
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82 | for (int i = 0; i < this.variableNames.Count; i++) {
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83 | var variableName = this.variableNames[i];
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84 | var values = variableValues.ElementAt(i);
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85 | this.variableValues.Add(variableName, values);
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86 | }
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87 | }
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88 | }
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89 |
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90 | public Dataset(IEnumerable<string> variableNames, double[,] variableValues) {
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91 | Name = "-";
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92 | if (variableNames.Count() != variableValues.GetLength(1)) {
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93 | throw new ArgumentException("Number of variable names doesn't match the number of columns of variableValues");
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94 | }
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95 | if (variableNames.Distinct().Count() != variableNames.Count()) {
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96 | var duplicateVariableNames = variableNames.GroupBy(v => v).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
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97 | string message = "The dataset cannot contain duplicate variables names: " + Environment.NewLine;
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98 | foreach (var duplicateVariableName in duplicateVariableNames)
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99 | message += duplicateVariableName + Environment.NewLine;
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100 | throw new ArgumentException(message);
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101 | }
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102 |
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103 | rows = variableValues.GetLength(0);
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104 | this.variableNames = new List<string>(variableNames);
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105 |
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106 | this.variableValues = new Dictionary<string, IList>(variableValues.GetLength(1));
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107 | for (int col = 0; col < variableValues.GetLength(1); col++) {
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108 | string columName = this.variableNames[col];
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109 | var values = new List<double>(variableValues.GetLength(0));
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110 | for (int row = 0; row < variableValues.GetLength(0); row++) {
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111 | values.Add(variableValues[row, col]);
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112 | }
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113 | this.variableValues.Add(columName, values);
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114 | }
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115 | }
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116 |
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117 | public static Dataset FromRowData(IEnumerable<string> variableNames, double[,] data) {
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118 | var colWise = new List<IList>(data.GetLength(1));
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119 | for (var col = 0; col < data.GetLength(1); col++) {
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120 | var column = new List<double>(data.GetLength(0));
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121 | for (var row = 0; row < data.GetLength(0); row++) {
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122 | column.Add(data[row, col]);
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123 | }
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124 | colWise.Add(column);
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125 | }
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126 | return new Dataset(variableNames, colWise);
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127 | }
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128 |
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129 | public static Dataset FromRowData(IEnumerable<string> variableNames, IEnumerable<IList> data) {
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130 | var vnames = variableNames.ToList();
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131 | var transposed = new List<IList>();
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132 | var iter = data.GetEnumerator();
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133 | if (!iter.MoveNext()) throw new ArgumentException("Data does not contain any rows", nameof(data));
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134 | for (var i = 0; i < iter.Current.Count; i++) {
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135 | if (i >= vnames.Count) throw new ArgumentException("There are more variables in data, than variable names.", nameof(variableNames));
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136 | if (iter.Current[i] == null) throw new ArgumentException("Null values are not supported.", nameof(data));
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137 | if (!IsAllowedType(iter.Current[i].GetType())) throw new ArgumentException("Data contains types that are not allowed.", nameof(data));
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138 | if (iter.Current[i] is double d)
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139 | transposed.Add(new List<double>() { d });
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140 | else if (iter.Current[i] is DateTime dt)
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141 | transposed.Add(new List<DateTime>() { dt });
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142 | else if (iter.Current[i] is string s)
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143 | transposed.Add(new List<string>() { s });
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144 | else if (iter.Current[i] is DoubleVector dv)
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145 | transposed.Add(new List<DoubleVector>() { dv });
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146 | else if (iter.Current[i] is StringVector sv)
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147 | transposed.Add(new List<StringVector>() { sv });
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148 | else if (iter.Current[i] is DateTimeVector dtv)
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149 | transposed.Add(new List<DateTimeVector>() { dtv });
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150 | else throw new NotSupportedException(string.Format("Variable {0} has type {1}. This is not supported when converting from row-wise data.", vnames[i], iter.Current[i].GetType()));
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151 | }
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152 | if (transposed.Count < vnames.Count) throw new ArgumentException("There are less variables in data, than variable names.", nameof(variableNames));
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153 | while (iter.MoveNext()) {
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154 | for (var i = 0; i < iter.Current.Count; i++)
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155 | if (transposed[i].Add(iter.Current[i]) < 0)
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156 | throw new ArgumentException(string.Format("Variable {0} has invalid value ({1})", vnames[i], iter.Current[i]), nameof(data));
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157 | }
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158 | return new Dataset(vnames, transposed);
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159 | }
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160 |
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161 | public ModifiableDataset ToModifiable() {
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162 | return new ModifiableDataset(variableNames, variableNames.Select(v => variableValues[v]), true);
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163 | }
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164 |
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165 | /// <summary>
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166 | /// Shuffle a dataset's rows
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167 | /// </summary>
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168 | /// <param name="random">Random number generator used for shuffling.</param>
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169 | /// <returns>A shuffled copy of the current dataset.</returns>
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170 | public Dataset Shuffle(IRandom random) {
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171 | var values = variableNames.Select(x => variableValues[x]).ToList();
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172 | return new Dataset(variableNames, values.ShuffleLists(random));
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173 | }
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174 |
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175 |
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176 |
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177 | #region Backwards compatible code, remove with 3.5
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178 | private double[,] storableData;
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179 | //name alias used to support backwards compatibility
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180 | [Storable(OldName = "data")]
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181 | private double[,] StorableData { set { storableData = value; } }
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182 |
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183 | [StorableHook(HookType.AfterDeserialization)]
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184 | private void AfterDeserialization() {
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185 | if (variableValues == null) {
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186 | rows = storableData.GetLength(0);
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187 | variableValues = new Dictionary<string, IList>();
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188 | for (int col = 0; col < storableData.GetLength(1); col++) {
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189 | string columName = variableNames[col];
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190 | var values = new List<double>(rows);
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191 | for (int row = 0; row < rows; row++) {
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192 | values.Add(storableData[row, col]);
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193 | }
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194 | variableValues.Add(columName, values);
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195 | }
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196 | storableData = null;
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197 | }
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198 | }
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199 | #endregion
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200 |
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201 | [Storable(Name = "VariableValues")]
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202 | protected Dictionary<string, IList> variableValues;
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203 |
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204 | protected List<string> variableNames;
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205 | [Storable]
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206 | public IEnumerable<string> VariableNames {
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207 | get { return variableNames; }
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208 | protected set {
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209 | if (variableNames != null) throw new InvalidOperationException();
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210 | variableNames = new List<string>(value);
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211 | }
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212 | }
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213 |
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214 | public bool ContainsVariable(string variableName) {
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215 | return variableValues.ContainsKey(variableName);
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216 | }
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217 | public IEnumerable<string> DoubleVariables {
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218 | get { return variableValues.Where(p => p.Value is IList<double>).Select(p => p.Key); }
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219 | }
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220 | public IEnumerable<string> StringVariables {
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221 | get { return variableValues.Where(p => p.Value is IList<string>).Select(p => p.Key); }
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222 | }
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223 | public IEnumerable<string> DateTimeVariables {
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224 | get { return variableValues.Where(p => p.Value is IList<DateTime>).Select(p => p.Key); }
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225 | }
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226 | public IEnumerable<string> DoubleVectorVariables {
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227 | get { return variableValues.Where(p => p.Value is IList<DoubleVector>).Select(p => p.Key); }
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228 | }
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229 | public IEnumerable<string> StringVectorVariables {
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230 | get { return variableValues.Where(p => p.Value is IList<StringVector>).Select(p => p.Key); }
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231 | }
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232 | public IEnumerable<string> DateTimeVectorVariables {
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233 | get { return variableValues.Where(p => p.Value is IList<DateTimeVector>).Select(p => p.Key); }
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234 | }
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235 |
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236 | public IEnumerable<double> GetDoubleValues(string variableName) {
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237 | return GetValues<double>(variableName);
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238 | }
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239 | public IEnumerable<string> GetStringValues(string variableName) {
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240 | return GetValues<string>(variableName);
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241 | }
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242 | public IEnumerable<DateTime> GetDateTimeValues(string variableName) {
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243 | return GetValues<DateTime>(variableName);
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244 | }
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245 | public IEnumerable<DoubleVector> GetDoubleVectorValues(string variableName) {
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246 | return GetValues<DoubleVector>(variableName);
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247 | }
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248 | public IEnumerable<StringVector> GetStringVectorValues(string variableName) {
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249 | return GetValues<StringVector>(variableName);
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250 | }
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251 | public IEnumerable<DateTimeVector> GetDateTimeVectorValues(string variableName) {
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252 | return GetValues<DateTimeVector>(variableName);
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253 | }
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254 |
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255 | public ReadOnlyCollection<double> GetReadOnlyDoubleValues(string variableName) {
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256 | var values = GetValues<double>(variableName);
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257 | return new ReadOnlyCollection<double>(values);
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258 | }
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259 | public double GetDoubleValue(string variableName, int row) {
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260 | var values = GetValues<double>(variableName);
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261 | return values[row];
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262 | }
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263 | public IEnumerable<double> GetDoubleValues(string variableName, IEnumerable<int> rows) {
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264 | return GetValues<double>(variableName, rows);
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265 | }
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266 |
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267 | public string GetStringValue(string variableName, int row) {
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268 | var values = GetValues<string>(variableName);
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269 | return values[row];
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270 | }
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271 | public IEnumerable<string> GetStringValues(string variableName, IEnumerable<int> rows) {
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272 | return GetValues<string>(variableName, rows);
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273 | }
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274 | public ReadOnlyCollection<string> GetReadOnlyStringValues(string variableName) {
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275 | var values = GetValues<string>(variableName);
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276 | return new ReadOnlyCollection<string>(values);
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277 | }
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278 |
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279 | public DateTime GetDateTimeValue(string variableName, int row) {
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280 | var values = GetValues<DateTime>(variableName);
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281 | return values[row];
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282 | }
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283 | public IEnumerable<DateTime> GetDateTimeValues(string variableName, IEnumerable<int> rows) {
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284 | return GetValues<DateTime>(variableName, rows);
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285 | }
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286 | public ReadOnlyCollection<DateTime> GetReadOnlyDateTimeValues(string variableName) {
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287 | var values = GetValues<DateTime>(variableName);
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288 | return new ReadOnlyCollection<DateTime>(values);
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289 | }
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290 |
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291 | public DoubleVector GetDoubleVectorValue(string variableName, int row) {
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292 | var values = GetValues<DoubleVector>(variableName);
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293 | return values[row];
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294 | }
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295 | public IEnumerable<DoubleVector> GetDoubleVectorValues(string variableName, IEnumerable<int> rows) {
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296 | return GetValues<DoubleVector>(variableName, rows);
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297 | }
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298 | public ReadOnlyCollection<DoubleVector> GetReadOnlyDoubleVectorValues(string variableName) {
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299 | var values = GetValues<DoubleVector>(variableName);
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300 | return new ReadOnlyCollection<DoubleVector>(values);
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301 | }
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302 |
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303 | public StringVector GetStringVectorValue(string variableName, int row) {
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304 | var values = GetValues<StringVector>(variableName);
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305 | return values[row];
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306 | }
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307 | public IEnumerable<StringVector> GetStringVectorValues(string variableName, IEnumerable<int> rows) {
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308 | return GetValues<StringVector>(variableName, rows);
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309 | }
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310 | public ReadOnlyCollection<StringVector> GetReadOnlyStringVectorValues(string variableName) {
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311 | var values = GetValues<StringVector>(variableName);
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312 | return new ReadOnlyCollection<StringVector>(values);
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313 | }
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314 |
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315 | public DateTimeVector GetDateTimeVectorValue(string variableName, int row) {
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316 | var values = GetValues<DateTimeVector>(variableName);
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317 | return values[row];
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318 | }
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319 | public IEnumerable<DateTimeVector> GetDateTimeVectorValues(string variableName, IEnumerable<int> rows) {
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320 | return GetValues<DateTimeVector>(variableName, rows);
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321 | }
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322 | public ReadOnlyCollection<DateTimeVector> GetReadOnlyDateTimeVectorValues(string variableName) {
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323 | var values = GetValues<DateTimeVector>(variableName);
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324 | return new ReadOnlyCollection<DateTimeVector>(values);
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325 | }
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326 |
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327 | private IEnumerable<T> GetValues<T>(string variableName, IEnumerable<int> rows) {
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328 | var values = GetValues<T>(variableName);
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329 | return rows.Select(x => values[x]);
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330 | }
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331 | private IList<T> GetValues<T>(string variableName) {
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332 | IList list;
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333 | if (!variableValues.TryGetValue(variableName, out list))
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334 | throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
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335 | IList<T> values = list as IList<T>;
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336 | if (values == null) throw new ArgumentException("The variable " + variableName + " is not a " + typeof(T) + " variable.");
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337 | return values;
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338 | }
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339 | public bool VariableHasType<T>(string variableName) {
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340 | return variableValues[variableName] is IList<T>;
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341 | }
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342 | protected Type GetVariableType(string variableName) {
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343 | IList list;
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344 | variableValues.TryGetValue(variableName, out list);
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345 | if (list == null)
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346 | throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
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347 | return GetElementType(list);
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348 | }
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349 | protected static Type GetElementType(IList list) {
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350 | var type = list.GetType();
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351 | return type.IsGenericType ? type.GetGenericArguments()[0] : type.GetElementType();
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352 | }
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353 | protected static bool IsAllowedType(IList list) {
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354 | var type = GetElementType(list);
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355 | return IsAllowedType(type);
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356 | }
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357 | protected static bool IsAllowedType(Type type) {
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358 | return type == typeof(double) || type == typeof(string) || type == typeof(DateTime)
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359 | || type == typeof(DoubleVector) || type == typeof(StringVector) || type == typeof(DateTimeVector);
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360 | }
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361 |
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362 | protected static void CheckArguments(IEnumerable<string> variableNames, IEnumerable<IList> variableValues) {
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363 | if (variableNames.Count() != variableValues.Count()) {
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364 | throw new ArgumentException("Number of variable names doesn't match the number of columns of variableValues");
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365 | } else if (!variableValues.All(list => list.Count == variableValues.First().Count)) {
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366 | throw new ArgumentException("The number of values must be equal for every variable");
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367 | } else if (variableNames.Distinct().Count() != variableNames.Count()) {
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368 | var duplicateVariableNames =
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369 | variableNames.GroupBy(v => v).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
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370 | string message = "The dataset cannot contain duplicate variables names: " + Environment.NewLine;
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371 | foreach (var duplicateVariableName in duplicateVariableNames)
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372 | message += duplicateVariableName + Environment.NewLine;
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373 | throw new ArgumentException(message);
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374 | }
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375 | // check if all the variables are supported
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376 | foreach (var t in variableNames.Zip(variableValues, Tuple.Create)) {
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377 | var variableName = t.Item1;
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378 | var values = t.Item2;
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379 |
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380 | if (!IsAllowedType(values)) {
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381 | throw new ArgumentException(string.Format("Unsupported type {0} for variable {1}.", GetElementType(values), variableName));
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382 | }
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383 | }
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384 | }
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385 |
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386 | protected static Dictionary<string, IList> CloneValues(Dictionary<string, IList> variableValues) {
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387 | return variableValues.ToDictionary(x => x.Key, x => CloneValues(x.Value));
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388 | }
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389 |
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390 | protected static Dictionary<string, IList> CloneValues(IEnumerable<string> variableNames, IEnumerable<IList> variableValues) {
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391 | return variableNames.Zip(variableValues, Tuple.Create).ToDictionary(x => x.Item1, x => CloneValues(x.Item2));
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392 | }
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393 |
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394 | protected static IList CloneValues(IList values) {
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395 | var doubleValues = values as IList<double>;
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396 | if (doubleValues != null) return new List<double>(doubleValues);
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397 |
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398 | var stringValues = values as IList<string>;
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399 | if (stringValues != null) return new List<string>(stringValues);
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400 |
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401 | var dateTimeValues = values as IList<DateTime>;
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402 | if (dateTimeValues != null) return new List<DateTime>(dateTimeValues);
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403 |
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404 | var doubleVectorValues = values as IList<DoubleVector>;
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405 | if (doubleVectorValues != null) return doubleVectorValues.Select(x => new DoubleVector(x)).ToList();
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406 |
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407 | var stringVectorValues = values as IList<StringVector>;
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408 | if (stringVectorValues != null) return stringVectorValues.Select(x => new StringVector(x)).ToList();
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409 |
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410 | var dateTimeVectorValues = values as IList<DateTimeVector>;
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411 | if (dateTimeVectorValues != null) return dateTimeVectorValues.Select(x => new DateTimeVector(x)).ToList();
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412 |
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413 | throw new ArgumentException(string.Format("Unsupported variable type {0}.", GetElementType(values)));
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414 | }
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415 |
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416 | #region IStringConvertibleMatrix Members
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417 | [Storable]
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418 | private int rows;
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419 | public int Rows {
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420 | get { return rows; }
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421 | protected set { rows = value; }
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422 | }
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423 | int IStringConvertibleMatrix.Rows {
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424 | get { return Rows; }
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425 | set { throw new NotSupportedException(); }
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426 | }
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427 |
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428 | public int Columns {
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429 | get { return variableNames.Count; }
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430 | }
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431 | int IStringConvertibleMatrix.Columns {
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432 | get { return Columns; }
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433 | set { throw new NotSupportedException(); }
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434 | }
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435 | bool IStringConvertibleMatrix.SortableView {
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436 | get { return false; }
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437 | set { throw new NotSupportedException(); }
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438 | }
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439 | bool IStringConvertibleMatrix.ReadOnly {
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440 | get { return true; }
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441 | }
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442 | IEnumerable<string> IStringConvertibleMatrix.ColumnNames {
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443 | get { return this.VariableNames; }
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444 | set { throw new NotSupportedException(); }
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445 | }
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446 | IEnumerable<string> IStringConvertibleMatrix.RowNames {
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447 | get { return Enumerable.Empty<string>(); }
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448 | set { throw new NotSupportedException(); }
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449 | }
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450 | string IStringConvertibleMatrix.GetValue(int rowIndex, int columnIndex) {
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451 | var value = variableValues[variableNames[columnIndex]][rowIndex];
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452 | if (value is IVector vector)
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453 | return $"[{string.Join(", ", vector.Cast<object>())}]";
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454 | return value.ToString();
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455 | }
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456 | bool IStringConvertibleMatrix.SetValue(string value, int rowIndex, int columnIndex) {
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457 | throw new NotSupportedException();
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458 | }
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459 | bool IStringConvertibleMatrix.Validate(string value, out string errorMessage) {
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460 | throw new NotSupportedException();
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461 | }
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462 |
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463 | public virtual event EventHandler ColumnsChanged { add { } remove { } }
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464 | public virtual event EventHandler RowsChanged { add { } remove { } }
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465 | public virtual event EventHandler ColumnNamesChanged { add { } remove { } }
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466 | public virtual event EventHandler RowNamesChanged { add { } remove { } }
|
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467 | public virtual event EventHandler SortableViewChanged { add { } remove { } }
|
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468 | public virtual event EventHandler<EventArgs<int, int>> ItemChanged { add { } remove { } }
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469 | public virtual event EventHandler Reset { add { } remove { } }
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470 | #endregion
|
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471 | }
|
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472 | }
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