Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java @ 2992:0abdede5a0b8
FixA: Added facet to return delta w/t as CSV
flys-artifacts/trunk@4543 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 28 May 2012 18:35:01 +0000 |
parents | 063b784b60b4 |
children | 70469e3d34b9 |
rev | line source |
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1 package de.intevation.flys.artifacts.model.fixings; |
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2 |
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3 import de.intevation.flys.artifacts.FixationArtifactAccess; |
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4 |
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5 import de.intevation.flys.artifacts.math.fitting.Function; |
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6 import de.intevation.flys.artifacts.math.fitting.FunctionFactory; |
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7 |
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8 import de.intevation.flys.artifacts.model.Calculation; |
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9 import de.intevation.flys.artifacts.model.CalculationResult; |
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10 import de.intevation.flys.artifacts.model.FixingsColumn; |
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11 import de.intevation.flys.artifacts.model.FixingsColumnFactory; |
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12 import de.intevation.flys.artifacts.model.FixingsOverview; |
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13 import de.intevation.flys.artifacts.model.FixingsOverviewFactory; |
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14 import de.intevation.flys.artifacts.model.Parameters; |
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15 |
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16 import de.intevation.flys.artifacts.model.FixingsOverview.Range; |
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17 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing; |
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18 import de.intevation.flys.artifacts.model.FixingsOverview.IdFilter; |
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19 import de.intevation.flys.artifacts.model.FixingsOverview.AndFilter; |
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20 import de.intevation.flys.artifacts.model.FixingsOverview.DateRangeFilter; |
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21 import de.intevation.flys.artifacts.model.FixingsOverview.SectorRangeFilter; |
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22 |
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23 import de.intevation.flys.utils.DoubleUtil; |
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24 |
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25 import java.util.ArrayList; |
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26 import java.util.List; |
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27 import java.util.Date; |
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28 |
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29 import org.apache.commons.math.MathException; |
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30 |
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31 import org.apache.commons.math.optimization.fitting.CurveFitter; |
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32 |
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33 import org.apache.commons.math.optimization.general.LevenbergMarquardtOptimizer; |
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34 |
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35 import org.apache.log4j.Logger; |
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36 |
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37 public class FixCalculation |
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38 extends Calculation |
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39 { |
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40 private static Logger log = Logger.getLogger(FixCalculation.class); |
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41 |
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42 protected String river; |
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43 protected double from; |
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44 protected double to; |
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45 protected double step; |
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46 protected boolean preprocessing; |
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47 protected String function; |
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48 protected int [] events; |
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49 protected long [][] analysisPeriods; |
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50 protected int qSectorStart; |
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51 protected int qSectorEnd; |
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52 |
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53 public FixCalculation() { |
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54 } |
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55 |
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56 public FixCalculation(FixationArtifactAccess access) { |
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57 |
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58 String river = access.getRiver(); |
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59 Double from = access.getFrom(); |
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60 Double to = access.getTo(); |
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61 Double step = access.getStep(); |
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62 String function = access.getFunction(); |
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63 int [] events = access.getEvents(); |
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64 long [][] analysisPeriods = access.getAnalysisPeriods(); |
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65 Integer qSectorStart = access.getQSectorStart(); |
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66 Integer qSectorEnd = access.getQSectorEnd(); |
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67 |
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68 if (river == null) { |
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69 // TODO: i18n |
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70 addProblem("fix.missing.river"); |
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71 } |
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72 |
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73 if (from == null) { |
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74 // TODO: i18n |
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75 addProblem("fix.missing.from"); |
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76 } |
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77 |
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78 if (to == null) { |
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79 // TODO: i18n |
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80 addProblem("fix.missing.to"); |
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81 } |
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82 |
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83 if (step == null) { |
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84 // TODO: i18n |
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85 addProblem("fix.missing.step"); |
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86 } |
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87 |
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88 if (function == null) { |
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89 // TODO: i18n |
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90 addProblem("fix.missing.function"); |
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91 } |
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92 |
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93 if (events == null || events.length < 1) { |
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94 // TODO: i18n |
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95 addProblem("fix.missing.events"); |
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96 } |
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97 |
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98 if (analysisPeriods == null || analysisPeriods.length < 1) { |
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99 // TODO: i18n |
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100 addProblem("fix.missing.analysis.periods"); |
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101 } |
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102 |
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103 if (qSectorStart == null) { |
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104 // TODO: i18n |
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105 addProblem("fix.missing.qstart.sector"); |
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106 } |
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107 |
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108 if (qSectorEnd == null) { |
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109 // TODO: i18n |
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110 addProblem("fix.missing.qend.sector"); |
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111 } |
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112 |
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113 if (!hasProblems()) { |
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114 this.river = river; |
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115 this.from = from; |
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116 this.to = to; |
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117 this.step = step; |
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118 this.function = function; |
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119 this.events = events; |
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120 this.analysisPeriods = analysisPeriods; |
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121 this.qSectorStart = qSectorStart; |
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122 this.qSectorEnd = qSectorEnd; |
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123 } |
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124 } |
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125 |
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126 public CalculationResult calculate() { |
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127 |
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128 boolean debug = log.isDebugEnabled(); |
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129 |
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130 FixingsOverview overview = |
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131 FixingsOverviewFactory.getOverview(river); |
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132 |
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133 if (overview == null) { |
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134 addProblem("fix.no.overview.available"); |
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135 } |
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136 |
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137 Function func = FunctionFactory.getInstance() |
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138 .getFunction(function); |
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139 |
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140 if (func == null) { |
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141 // TODO: i18n |
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142 addProblem("fix.invalid.function.name"); |
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143 } |
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144 |
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145 if (hasProblems()) { |
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146 return new CalculationResult(this); |
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147 } |
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148 |
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149 FixingsColumnFactory fcf = FixingsColumnFactory.getInstance(); |
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150 |
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151 List<FixingsColumn> dataColumns = |
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152 new ArrayList<FixingsColumn>(events.length); |
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153 |
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154 for (int eventId: events) { |
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155 IdFilter idFilter = new IdFilter(eventId); |
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156 |
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157 List<Fixing.Column> columns = overview.filter(null, idFilter); |
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158 if (columns.isEmpty()) { |
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159 // TODO: i18n |
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160 addProblem("fix.missing.column", eventId); |
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161 continue; |
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162 } |
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163 FixingsColumn dataColumn = fcf.getColumnData(columns.get(0)); |
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164 if (dataColumn == null) { |
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165 // TODO: i18n |
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166 addProblem("fix.cannot.load.data", eventId); |
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167 continue; |
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168 } |
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169 dataColumns.add(dataColumn); |
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170 } |
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171 |
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172 if (dataColumns.size() < 2) { |
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173 // TODO: i18n |
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174 addProblem("fix.too.less.data.columns"); |
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175 return new CalculationResult(this); |
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176 } |
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177 |
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178 double [] kms = DoubleUtil.explode(from, to, step / 1000.0); |
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179 |
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180 double [] ws = new double[dataColumns.size()]; |
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181 double [] qs = new double[ws.length]; |
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182 |
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183 String [] parameterNames = func.getParameterNames(); |
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184 |
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185 Parameters results = |
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186 new Parameters(createColumnNames(parameterNames)); |
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187 |
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188 boolean invalid = false; |
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189 |
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190 if (debug) { |
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191 log.debug("number of kms: " + kms.length); |
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192 } |
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193 |
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194 int numFailed = 0; |
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195 |
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196 for (int i = 0; i < kms.length; ++i) { |
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197 double km = kms[i]; |
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198 |
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199 for (int j = 0; j < ws.length; ++j) { |
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200 FixingsColumn column = dataColumns.get(j); |
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201 qs[j] = column.getQ(km); |
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202 boolean interpolated = column.getW(km, ws, j); |
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203 // TODO: mark as interpolated. |
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204 } |
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205 |
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206 // TODO: Do preprocessing here! |
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207 double [] parameters = fit(func, km, ws, qs); |
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208 if (parameters == null) { // Problems are reported already. |
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209 ++numFailed; |
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210 continue; |
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211 } |
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212 |
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213 int row = results.newRow(); |
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214 |
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215 results.set(row, "km", km); |
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216 for (int j = 0; j < parameters.length; ++j) { |
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217 if (Double.isNaN(parameters[j])) { |
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218 invalid = true; |
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219 } |
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220 else { |
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221 results.set(row, parameterNames[j], parameters[j]); |
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222 } |
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223 } |
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224 // TODO: Calculate statistics, too! |
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225 } |
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226 |
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227 if (debug) { |
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228 log.debug("success: " + (kms.length - numFailed)); |
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229 log.debug("failed: " + numFailed); |
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230 } |
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231 |
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232 if (invalid) { |
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233 // TODO: i18n |
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234 addProblem("fix.invalid.values"); |
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235 results.removeNaNs(); |
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236 } |
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237 |
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238 // Calculate Delta W/t |
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239 DeltaWTsKM deltaWTsKM = calculateDeltaWTs( |
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240 func, |
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241 overview, |
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242 results); |
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243 |
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244 FixResult fr = new FixResult(results, deltaWTsKM); |
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245 |
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246 return new CalculationResult(fr, this); |
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247 } |
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248 |
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249 public DeltaWTsKM calculateDeltaWTs( |
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250 Function function, |
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251 FixingsOverview overview, |
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252 Parameters results |
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253 ) { |
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254 DeltaWTsKM deltaWTsKM = new DeltaWTsKM(results.size()); |
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255 |
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256 Column [][] analysisColumns = getAnalysisColumns(overview); |
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257 |
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258 int [] parameterIndices = |
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259 results.columnIndices(function.getParameterNames()); |
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260 |
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261 double [] parameterValues = |
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262 new double[parameterIndices.length]; |
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263 |
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264 double [] ow = new double[1]; |
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265 |
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266 for (int i = 0, N = results.size(); i < N; ++i) { |
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267 double km = results.get(i, "km"); |
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268 results.get(i, parameterIndices, parameterValues); |
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269 |
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270 DeltaWTsKM.KM dwtkm = new DeltaWTsKM.KM(km); |
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271 deltaWTsKM.add(dwtkm); |
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272 |
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273 // This is the paraterized function for a given km. |
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274 de.intevation.flys.artifacts.math.Function instance = |
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275 function.instantiate(parameterValues); |
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276 |
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277 // Evaluate all columns for all analysis periods. |
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278 for (int j = 0; j < analysisColumns.length; ++j) { |
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279 Column [] periodColumns = analysisColumns[j]; |
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280 |
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281 for (int k = 0; k < periodColumns.length; ++k) { |
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282 Column pc = periodColumns[k]; |
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283 |
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284 // Q from real data. |
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285 double q = pc.data.getQ(km); |
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286 if (Double.isNaN(q)) { |
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287 continue; |
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288 } |
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289 |
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290 // Calculate W from function. |
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291 double nw = instance.value(q); |
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292 if (Double.isNaN(nw)) { |
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293 continue; |
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294 } |
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295 |
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296 // W from real data. |
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297 pc.data.getW(km, ow); |
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298 |
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299 if (Double.isNaN(ow[0])) { |
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300 continue; |
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301 } |
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302 |
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303 double deltaW = ow[0] - nw; |
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304 |
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305 DeltaWT deltaWT = new DeltaWT( |
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306 deltaW, |
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307 pc.meta.getStartTime(), |
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308 pc.meta.getDescription()); |
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309 |
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310 dwtkm.add(deltaWT); |
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311 } |
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312 } |
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313 } |
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314 |
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315 return deltaWTsKM; |
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316 } |
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317 |
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318 /** Helper class to bundle the meta information of a column |
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319 * and the real data. |
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320 */ |
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321 protected static class Column { |
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322 |
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323 protected Fixing.Column meta; |
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324 protected FixingsColumn data; |
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325 |
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326 public Column() { |
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327 } |
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328 |
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329 public Column(Fixing.Column meta, FixingsColumn data) { |
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330 this.meta = meta; |
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331 this.data = data; |
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332 } |
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333 } // class Column |
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334 |
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335 /** Fetch meta and data columns for analysis periods. */ |
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336 protected Column [][] getAnalysisColumns(FixingsOverview overview) { |
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337 |
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338 Column columns [][] = new Column[analysisPeriods.length][]; |
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339 |
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340 Range range = new Range(from, to); |
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341 SectorRangeFilter sectorRangeFilter = |
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342 new SectorRangeFilter(qSectorStart, qSectorEnd); |
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343 |
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344 FixingsColumnFactory fcf = FixingsColumnFactory.getInstance(); |
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345 |
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346 for (int i = 0; i < columns.length; ++i) { |
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347 |
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348 // Construct filter for period. |
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349 long [] period = analysisPeriods[i]; |
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350 |
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351 AndFilter filter = new AndFilter(); |
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352 |
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353 DateRangeFilter dateRangeFilter = |
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354 new DateRangeFilter( |
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355 new Date(period[0]), |
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356 new Date(period[1])); |
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357 |
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358 filter.add(dateRangeFilter); |
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359 filter.add(sectorRangeFilter); |
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360 |
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361 List<Fixing.Column> metaCols = overview.filter(range, filter); |
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362 |
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363 ArrayList<Column> cols = new ArrayList<Column>(metaCols.size()); |
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364 |
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365 // Only use columns which have data. |
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366 for (Fixing.Column meta: metaCols) { |
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367 FixingsColumn data = fcf.getColumnData(meta); |
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368 if (data != null) { |
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369 cols.add(new Column(meta, data)); |
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370 } |
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371 } |
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372 columns[i] = cols.toArray(new Column[cols.size()]); |
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373 } |
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374 |
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375 return columns; |
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376 } |
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377 |
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378 protected static String [] createColumnNames(String [] parameters) { |
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379 String [] result = new String[parameters.length + 1]; |
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380 result[0] = "km"; |
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381 // TODO: Add statistic columns, too. |
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382 System.arraycopy(parameters, 0, result, 1, parameters.length); |
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383 return result; |
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384 } |
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385 |
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386 protected double [] fit( |
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387 Function function, |
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388 double km, |
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389 double [] ws, |
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390 double [] qs |
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391 ) { |
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392 LevenbergMarquardtOptimizer lmo = new LevenbergMarquardtOptimizer(); |
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393 CurveFitter cf = new CurveFitter(lmo); |
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394 |
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395 boolean missingWs = false; |
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396 boolean missingQs = false; |
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397 |
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398 for (int i = 0; i < ws.length; ++i) { |
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399 boolean ignore = false; |
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400 if (Double.isNaN(ws[i])) { |
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401 ignore = true; |
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402 if (!missingWs) { |
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403 missingWs = true; |
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404 // TODO: i18n |
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405 addProblem(km, "fix.missing.w"); |
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406 } |
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407 } |
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408 if (Double.isNaN(qs[i])) { |
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409 ignore = true; |
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410 if (!missingQs) { |
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411 missingQs = true; |
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412 // TODO: i18n |
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413 addProblem(km, "fix.missing.q"); |
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414 } |
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415 } |
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416 if (!ignore) { |
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417 cf.addObservedPoint(ws[i], qs[i]); |
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418 } |
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419 } |
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420 |
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421 try { |
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422 return cf.fit(function, function.getInitialGuess()); |
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423 } |
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424 catch (MathException me) { |
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425 log.warn(me, me); |
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426 addProblem(km, "fix.fitting.failed"); |
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427 } |
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428 |
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429 return null; |
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430 } |
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431 } |
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432 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |