Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/sq/SQRelationCalculation.java @ 3552:1df6984628c3

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S/Q: Extented the result data model of the S/Q calculation to store the curve coefficients for each iteration step of the outlier elimination. flys-artifacts/trunk@5146 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 27 Jul 2012 12:36:09 +0000
parents e7a67407dea1
children ba2f0bff0697
rev   line source
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1 package de.intevation.flys.artifacts.model.sq;
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3 import de.intevation.flys.artifacts.access.SQRelationAccess;
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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.DateRange;
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11 import de.intevation.flys.artifacts.model.Parameters;
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13 import de.intevation.flys.backend.SedDBSessionHolder;
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15 import java.util.ArrayList;
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16 import java.util.List;
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18 import org.apache.log4j.Logger;
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19
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20 public class SQRelationCalculation extends Calculation {
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21
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22 private static final Logger log =
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23 Logger.getLogger(SQRelationCalculation.class);
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24
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25 public static final String SQ_FUNCTION_NAME = "sq-pow";
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26
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27 protected String river;
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28 protected double location;
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29 protected DateRange period;
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30 protected double outliers;
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31
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32 public SQRelationCalculation() {
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33 }
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34
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35 public SQRelationCalculation(SQRelationAccess access) {
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36
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37 String river = access.getRiver();
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38 Double location = access.getLocation();
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39 DateRange period = access.getPeriod();
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40 Double outliers = access.getOutliers();
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41
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42 //river = "Rhein";
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43
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44 if (river == null) {
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45 // TODO: i18n
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46 addProblem("sq.missing.river");
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47 }
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48
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49 if (location == null) {
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50 // TODO: i18n
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51 addProblem("sq.missing.location");
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52 }
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53
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54 if (period == null) {
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55 // TODO: i18n
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56 addProblem("sq.missing.periods");
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57 }
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58
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59 if (outliers == null) {
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60 // TODO: i18n
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61 addProblem("sq.missing.outliers");
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62 }
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63
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64 if (!hasProblems()) {
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65 this.river = river;
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66 this.location = location;
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67 this.period = period;
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68 this.outliers = outliers;
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69 }
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70 }
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71
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72
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73 public CalculationResult calculate() {
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74 log.debug("SQRelationCalculation.calculate");
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75
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76 if (hasProblems()) {
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77 return new CalculationResult(this);
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78 }
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79
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80 SedDBSessionHolder.acquire();
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81 try {
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82 return internalCalculate();
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83 }
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84 finally {
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85 SedDBSessionHolder.release();
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86 }
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87 }
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88
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89 protected CalculationResult internalCalculate() {
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90
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91 boolean debug = log.isDebugEnabled();
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92
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93 Function function = FunctionFactory
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94 .getInstance()
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95 .getFunction(SQ_FUNCTION_NAME);
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96
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97 if (function == null) {
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98 log.error("No '" + SQ_FUNCTION_NAME + "' function found.");
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99 // TODO: i18n
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100 addProblem("sq.missing.sq.function");
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101 }
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102
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103 String [] parameterNames = function.getParameterNames();
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104
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105 Measurements measurements =
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106 MeasurementFactory.getMeasurements(river, location, period);
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107
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108 SQFractionResult [] fractionResults =
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109 new SQFractionResult[SQResult.NUMBER_FRACTIONS];
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110
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111 for (int i = 0; i < fractionResults.length; ++i) {
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112 List<SQ> sqs = measurements.getSQs(i);
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113
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114 SQFractionResult fractionResult;
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115
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116 List<SQFractionResult.Iteration> iterations =
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117 doFitting(function, sqs);
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118
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119 if (iterations == null) {
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120 // TODO: i18n
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121 addProblem("sq.fitting.failed." + i);
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122 fractionResult = new SQFractionResult();
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123 }
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124 else {
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125 fractionResult = new SQFractionResult(
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126 sqs.toArray(new SQ[sqs.size()]),
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127 iterations);
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128 }
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129
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130 fractionResults[i] = fractionResult;
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131 }
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132
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133 return new CalculationResult(
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134 new SQResult[] { new SQResult(location, fractionResults) },
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135 this);
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136 }
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137
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138 protected List<SQFractionResult.Iteration> doFitting(
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139 final Function function,
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140 List<SQ> sqs
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141 ) {
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142 final List<SQFractionResult.Iteration> iterations =
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143 new ArrayList<SQFractionResult.Iteration>();
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144
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145 boolean success = new Fitting(function, outliers).fit(
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146 sqs,
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147 new Fitting.Callback() {
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148 @Override
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149 public void afterIteration(
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150 double [] coeffs,
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151 SQ [] measurements,
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152 SQ [] outliers,
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153 double standardDeviation,
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154 double chiSqr
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155 ) {
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156 Parameters parameters = createParameters(
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157 function.getParameterNames(),
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158 coeffs,
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159 standardDeviation,
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160 chiSqr);
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161 iterations.add(new SQFractionResult.Iteration(
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162 parameters,
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163 measurements,
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164 outliers));
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165 }
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166 });
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167
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168 return success ? iterations : null;
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169 }
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170
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171 public static final Parameters createParameters(
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172 String [] names,
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173 double [] values,
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174 double standardDeviation,
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175 double chiSqr
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176 ) {
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177 String [] columns = new String[names.length + 2];
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178 columns[0] = "chi_sqr";
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179 columns[1] = "std_dev";
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180 System.arraycopy(names, 0, columns, 2, names.length);
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181 Parameters parameters = new Parameters(columns);
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182 int row = parameters.newRow();
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183 parameters.set(row, names, values);
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184 parameters.set(row, "chi_sqr", chiSqr);
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185 parameters.set(row, "std_dev", standardDeviation);
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186 return parameters;
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187 }
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188 }
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189 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org