Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/Parameters.java @ 6351:2c7a16d59f67
Use Double.NaN for missing values in middle bedheight calculation and write empty strings in csv export.
author | Raimund Renkert <rrenkert@intevation.de> |
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date | Mon, 17 Jun 2013 15:37:26 +0200 |
parents | af13ceeba52a |
children | cde863b2dae3 |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.artifacts.model; |
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10 |
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11 import org.dive4elements.river.artifacts.math.Linear; |
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12 |
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13 import org.dive4elements.river.utils.DoubleUtil; |
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14 |
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15 import gnu.trove.TDoubleArrayList; |
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16 |
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17 import java.io.Serializable; |
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18 |
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19 import org.apache.log4j.Logger; |
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20 |
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21 public class Parameters |
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22 implements Serializable |
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23 { |
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24 private static Logger log = Logger.getLogger(Parameters.class); |
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25 |
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26 public interface Visitor { |
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27 |
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28 void visit(double [] row); |
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29 |
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30 } // interface Visitor |
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31 |
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32 public static final double EPSILON = 1e-4; |
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33 |
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34 protected String [] columnNames; |
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35 protected TDoubleArrayList [] columns; |
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36 |
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37 public Parameters() { |
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38 } |
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39 |
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40 public Parameters(String [] columnNames) { |
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41 if (columnNames == null || columnNames.length < 1) { |
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42 throw new IllegalArgumentException("columnNames too short."); |
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43 } |
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44 this.columnNames = columnNames; |
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45 columns = new TDoubleArrayList[columnNames.length]; |
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46 for (int i = 0; i < columns.length; ++i) { |
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47 columns[i] = new TDoubleArrayList(); |
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48 } |
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49 } |
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50 |
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51 public int columnIndex(String name) { |
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52 for (int i = 0; i < columnNames.length; ++i) { |
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53 if (columnNames[i].equals(name)) { |
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54 return i; |
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55 } |
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56 } |
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57 if (log.isDebugEnabled()) { |
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58 log.debug("columnIndex: " + name + " not found in columnNames"); |
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59 } |
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60 return -1; |
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61 } |
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62 |
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63 public int newRow() { |
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64 |
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65 int N = columns[0].size(); |
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66 |
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67 for (int i = 0; i < columns.length; ++i) { |
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68 columns[i].add(Double.NaN); |
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69 } |
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70 |
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71 return N; |
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72 } |
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73 |
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74 public double get(int row, int index) { |
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75 return columns[index].getQuick(row); |
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76 } |
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77 |
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78 public double get(int i, String columnName) { |
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79 int index = columnIndex(columnName); |
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80 return index >= 0 |
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81 ? columns[index].getQuick(i) |
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82 : Double.NaN; |
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83 } |
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84 |
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85 public void set(int row, int index, double value) { |
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86 columns[index].setQuick(row, value); |
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87 } |
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88 |
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89 public void set(int i, String columnName, double value) { |
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90 int idx = columnIndex(columnName); |
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91 if (idx >= 0) { |
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92 columns[idx].setQuick(i, value); |
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93 } |
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94 } |
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95 |
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96 public boolean set(int row, int [] indices, double [] values) { |
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97 boolean invalid = false; |
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98 for (int i = 0; i < indices.length; ++i) { |
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99 double v = values[i]; |
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100 if (Double.isNaN(v)) { |
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101 invalid = true; |
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102 } |
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103 else { |
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104 columns[indices[i]].setQuick(row, v); |
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105 } |
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106 } |
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107 return invalid; |
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108 } |
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109 |
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110 public boolean set(int row, String [] names, double [] values) { |
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111 boolean success = true; |
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112 for (int i = 0; i < names.length; ++i) { |
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113 int idx = columnIndex(names[i]); |
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114 if (idx >= 0) { |
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115 columns[idx].setQuick(row, values[i]); |
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116 } |
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117 else { |
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118 success = false; |
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119 } |
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120 } |
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121 return success; |
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122 } |
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123 |
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124 public int size() { |
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125 return columns[0].size(); |
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126 } |
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127 |
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128 public int getNumberColumns() { |
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129 return columnNames.length; |
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130 } |
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131 |
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132 public String [] getColumnNames() { |
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133 return columnNames; |
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134 } |
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135 |
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136 public void removeNaNs() { |
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137 DoubleUtil.removeNaNs(columns); |
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138 } |
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139 |
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140 public int [] columnIndices(String [] columns) { |
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141 int [] indices = new int[columns.length]; |
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142 for (int i = 0; i < columns.length; ++i) { |
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143 indices[i] = columnIndex(columns[i]); |
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144 } |
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145 return indices; |
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146 } |
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147 |
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148 public double getValue(int row, String column) { |
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149 int idx = columnIndex(column); |
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150 return idx >= 0 |
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151 ? columns[idx].getQuick(row) |
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152 : Double.NaN; |
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153 } |
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154 |
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155 public double [] get(int row, String [] columns) { |
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156 return get(row, columns, new double[columns.length]); |
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157 } |
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158 |
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159 public double [] get(int row, String [] columns, double [] values) { |
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160 for (int i = 0; i < columns.length; ++i) { |
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161 int idx = columnIndex(columns[i]); |
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162 values[i] = idx < 0 |
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163 ? Double.NaN |
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164 : this.columns[idx].getQuick(row); |
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165 } |
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166 |
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167 return values; |
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168 } |
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169 |
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170 public void get(int row, int [] columnIndices, double [] values) { |
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171 for (int i = 0; i < columnIndices.length; ++i) { |
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172 int index = columnIndices[i]; |
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173 values[i] = index >= 0 && index < columns.length |
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174 ? columns[index].getQuick(row) |
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175 : Double.NaN; |
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176 } |
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177 } |
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178 |
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179 public int binarySearch(String columnName, double value) { |
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180 return binarySearch(columnIndex(columnName), value); |
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181 } |
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182 |
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183 /** |
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184 * Performes a binary search in the column identified by its |
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185 * index. |
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186 * @return Index of found element or negative insertion point (shifted by one) |
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187 */ |
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188 public int binarySearch(int columnIndex, double value) { |
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189 TDoubleArrayList column = columns[columnIndex]; |
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190 return column.binarySearch(value); |
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191 } |
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192 |
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193 public int binarySearch(String columnName, double value, double epsilon) { |
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194 return binarySearch(columnIndex(columnName), value, epsilon); |
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195 } |
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196 |
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197 public int binarySearch(int columnIndex, double value, double epsilon) { |
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198 if (epsilon < 0d) epsilon = -epsilon; |
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199 double vl = value - epsilon; |
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200 double vh = value + epsilon; |
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201 |
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202 TDoubleArrayList column = columns[columnIndex]; |
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203 int lo = 0, hi = column.size()-1; |
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204 while (hi >= lo) { |
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205 int mid = (lo + hi) >> 1; |
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206 double v = column.getQuick(mid); |
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207 if (v < vl) lo = mid + 1; |
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208 else if (v > vh) hi = mid - 1; |
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209 else return mid; |
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210 } |
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211 |
3059
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Parameters: Linear interpolation of parameters.
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212 return -(lo + 1); |
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213 } |
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214 |
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215 public double [] interpolate(int columnIndex, double key) { |
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216 return interpolate(columnIndex, key, new double[columns.length]); |
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217 } |
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218 |
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219 public double [] interpolate(String columnName, double key) { |
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220 return interpolate( |
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221 columnIndex(columnName), key, new double[columns.length]); |
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222 } |
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223 |
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224 public double [] interpolate( |
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225 String columnName, |
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226 double key, |
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227 double [] values |
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228 ) { |
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229 return interpolate(columnIndex(columnName), key, values); |
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230 } |
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231 |
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232 public double [] interpolate( |
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233 int columnIndex, |
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234 double key, |
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235 double [] values |
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236 ) { |
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237 int row = binarySearch(columnIndex, key, EPSILON); |
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238 |
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239 if (row >= 0) { // direct hit |
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240 for (int i = 0; i < values.length; ++i) { |
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241 values[i] = columns[i].getQuick(row); |
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242 } |
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243 } |
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244 else { |
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245 row = -row - 1; |
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246 if (row < 1 || row >= size()) { |
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247 return null; |
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248 } |
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249 double v1 = columns[columnIndex].getQuick(row-1); |
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250 double v2 = columns[columnIndex].getQuick(row); |
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251 double factor = Linear.factor(key, v1, v2); |
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252 for (int i = 0; i < values.length; ++i) { |
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253 values[i] = Linear.weight( |
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254 factor, |
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255 columns[i].getQuick(row-1), |
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256 columns[i].getQuick(row)); |
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257 } |
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258 } |
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259 return values; |
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260 } |
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261 |
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262 |
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263 public double [] interpolate( |
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264 String keyName, |
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265 double key, |
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266 String [] columnNames |
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267 ) { |
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268 int keyIndex = columnIndex(keyName); |
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269 return keyIndex < 0 |
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270 ? null |
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271 : interpolate(keyIndex, key, columnNames); |
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272 } |
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273 |
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274 public double [] interpolate( |
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275 int keyIndex, |
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276 double key, |
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277 String [] columnNames |
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278 ) { |
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279 int row = binarySearch(keyIndex, key, EPSILON); |
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280 |
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281 if (row >= 0) { // direct match |
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282 double [] values = new double[columnNames.length]; |
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283 for (int i = 0; i < values.length; ++i) { |
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284 int ci = columnIndex(columnNames[i]); |
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285 values[i] = ci < 0 |
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286 ? Double.NaN |
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287 : columns[ci].getQuick(row); |
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288 } |
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289 return values; |
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290 } |
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291 |
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292 row = -row - 1; |
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|
293 if (row < 1 || row >= size()) { |
3082
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FixA: Lowered log level in parameter interpolation.
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|
294 log.debug("interpolate: row is out of bounds"); |
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295 return null; |
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296 } |
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297 |
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298 double v1 = columns[keyIndex].getQuick(row-1); |
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299 double v2 = columns[keyIndex].getQuick(row); |
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300 double factor = Linear.factor(key, v1, v2); |
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301 |
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|
302 double [] values = new double[columnNames.length]; |
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303 |
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|
304 for (int i = 0; i < values.length; ++i) { |
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|
305 int ci = columnIndex(columnNames[i]); |
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306 values[i] = ci < 0 |
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|
307 ? Double.NaN |
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308 : Linear.weight( |
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309 factor, |
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310 columns[ci].getQuick(row-1), |
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311 columns[ci].getQuick(row)); |
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312 } |
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313 |
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314 return values; |
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315 } |
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316 |
3027
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|
317 public boolean isSorted(String columnName) { |
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318 return isSorted(columnIndex(columnName)); |
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319 } |
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320 |
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321 public boolean isSorted(int columnIndex) { |
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|
322 TDoubleArrayList column = columns[columnIndex]; |
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323 for (int i = 1, N = column.size(); i < N; ++i) { |
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324 if (column.getQuick(i-1) > column.getQuick(i)) { |
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325 return false; |
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326 } |
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327 } |
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328 return true; |
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FixA: Added binary search methods for parameters.
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329 } |
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330 |
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331 public void visit(Visitor visitor) { |
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332 visit(visitor, new double[columns.length]); |
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333 } |
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334 |
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335 public void visit(Visitor visitor, double [] data) { |
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336 for (int i = 0, R = size(); i < R; ++i) { |
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337 for (int j = 0; j < data.length; ++j) { |
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338 data[j] = columns[j].getQuick(i); |
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339 } |
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340 visitor.visit(data); |
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341 } |
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342 } |
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343 } |
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344 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |