Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/Fitting.java @ 5727:26dcd924befc
WQKmsFactory: Fix name sql.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 16 Apr 2013 12:39:12 +0200 |
parents | a7d080347ac3 |
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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 gnu.trove.TDoubleArrayList; |
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4 |
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5 import java.util.ArrayList; |
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6 import java.util.List; |
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7 |
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8 import org.apache.commons.math.MathException; |
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9 import org.apache.commons.math.optimization.fitting.CurveFitter; |
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10 import org.apache.commons.math.optimization.general.LevenbergMarquardtOptimizer; |
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11 import org.apache.commons.math.stat.descriptive.moment.StandardDeviation; |
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12 import org.apache.log4j.Logger; |
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13 |
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14 import de.intevation.flys.artifacts.math.GrubbsOutlier; |
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15 import de.intevation.flys.artifacts.math.fitting.Function; |
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16 |
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17 public class Fitting |
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18 { |
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19 private static Logger log = Logger.getLogger(Fitting.class); |
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20 |
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21 /** Use instance of this factory to find meta infos for outliers. */ |
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22 public interface QWDFactory { |
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23 |
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24 QWD create(double q, double w); |
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25 |
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26 } // interface QWFactory |
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27 |
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28 public static final QWDFactory QWD_FACTORY = new QWDFactory() { |
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29 @Override |
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30 public QWD create(double q, double w) { |
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31 return new QWD(q, w); |
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32 } |
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33 }; |
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34 |
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35 protected boolean checkOutliers; |
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36 protected Function function; |
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37 protected QWDFactory qwdFactory; |
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38 protected double chiSqr; |
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39 protected double [] parameters; |
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40 protected ArrayList<QWI> removed; |
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41 protected QWD [] referenced; |
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42 protected double standardDeviation; |
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43 |
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44 |
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45 public Fitting() { |
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46 removed = new ArrayList<QWI>(); |
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47 } |
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48 |
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49 public Fitting(Function function) { |
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50 this(function, QWD_FACTORY); |
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51 } |
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52 |
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53 public Fitting(Function function, QWDFactory qwdFactory) { |
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54 this(function, qwdFactory, false); |
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55 } |
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56 |
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57 public Fitting( |
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58 Function function, |
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59 QWDFactory qwdFactory, |
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60 boolean checkOutliers |
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61 ) { |
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62 this(); |
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63 this.function = function; |
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64 this.qwdFactory = qwdFactory; |
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65 this.checkOutliers = checkOutliers; |
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66 } |
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67 |
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68 public Function getFunction() { |
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69 return function; |
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70 } |
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71 |
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72 public void setFunction(Function function) { |
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73 this.function = function; |
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74 } |
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75 |
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76 public boolean getCheckOutliers() { |
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77 return checkOutliers; |
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78 } |
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79 |
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80 public void setCheckOutliers(boolean checkOutliers) { |
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81 this.checkOutliers = checkOutliers; |
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82 } |
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83 |
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84 public double getChiSquare() { |
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85 return chiSqr; |
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86 } |
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87 |
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88 public void reset() { |
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89 chiSqr = 0.0; |
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90 parameters = null; |
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91 removed.clear(); |
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92 referenced = null; |
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93 standardDeviation = 0.0; |
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94 } |
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95 |
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96 public boolean hasOutliers() { |
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97 return !removed.isEmpty(); |
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98 } |
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99 |
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100 public List<QWI> getOutliers() { |
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101 return removed; |
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102 } |
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103 |
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104 public QWI [] outliersToArray() { |
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105 return removed.toArray(new QWI[removed.size()]); |
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106 } |
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107 |
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108 public QWD [] referencedToArray() { |
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109 return referenced != null ? (QWD [])referenced.clone() : null; |
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110 } |
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111 |
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112 public double getMaxQ() { |
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113 double maxQ = -Double.MAX_VALUE; |
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114 if (referenced != null) { |
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115 for (QWI qw: referenced) { |
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116 if (qw.getQ() > maxQ) { |
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117 maxQ = qw.getQ(); |
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118 } |
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119 } |
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120 } |
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121 return maxQ; |
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122 } |
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123 |
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124 public double [] getParameters() { |
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125 return parameters; |
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126 } |
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127 |
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128 public double getStandardDeviation() { |
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129 return standardDeviation; |
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130 } |
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131 |
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132 public boolean fit(double [] qs, double [] ws) { |
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133 |
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134 TDoubleArrayList xs = new TDoubleArrayList(qs.length); |
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135 TDoubleArrayList ys = new TDoubleArrayList(ws.length); |
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136 |
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137 for (int i = 0; i < qs.length; ++i) { |
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138 if (!Double.isNaN(qs[i]) && !Double.isNaN(ws[i])) { |
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139 xs.add(qs[i]); |
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140 ys.add(ws[i]); |
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141 } |
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142 else { |
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143 log.warn("remove invalid value " + qs[i] + " " + ws[i]); |
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144 } |
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145 } |
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146 |
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147 if (xs.size() < 2) { |
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FixA: Improved W/Q facet code
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148 log.warn("Too less points."); |
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149 return false; |
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150 } |
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151 |
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152 List<Double> inputs = new ArrayList<Double>(xs.size()); |
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153 |
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154 de.intevation.flys.artifacts.math.Function instance = null; |
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155 |
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156 LevenbergMarquardtOptimizer lmo = null; |
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157 |
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158 for (;;) { |
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159 parameters = null; |
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160 for (double tolerance = 1e-10; tolerance < 1e-3; tolerance *= 10d) { |
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161 |
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162 lmo = new LevenbergMarquardtOptimizer(); |
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163 lmo.setCostRelativeTolerance(tolerance); |
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164 lmo.setOrthoTolerance(tolerance); |
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165 lmo.setParRelativeTolerance(tolerance); |
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166 |
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167 CurveFitter cf = new CurveFitter(lmo); |
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168 |
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169 for (int i = 0, N = xs.size(); i < N; ++i) { |
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170 cf.addObservedPoint(xs.getQuick(i), ys.getQuick(i)); |
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171 } |
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172 |
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173 try { |
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174 parameters = cf.fit(function, function.getInitialGuess()); |
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175 break; |
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176 } |
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177 catch (MathException me) { |
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178 if (log.isDebugEnabled()) { |
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179 log.debug("tolerance " + tolerance + " + failed."); |
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180 } |
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181 } |
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182 } |
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183 if (parameters == null) { |
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184 return false; |
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185 } |
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186 |
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FixA: Moved function instantiation to always have a valid function instance.
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187 // This is the paraterized function for a given km. |
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188 instance = function.instantiate(parameters); |
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189 |
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190 if (!checkOutliers) { |
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191 break; |
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192 } |
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193 |
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194 inputs.clear(); |
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195 |
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196 for (int i = 0, N = xs.size(); i < N; ++i) { |
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197 double y = instance.value(xs.getQuick(i)); |
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198 if (Double.isNaN(y)) { |
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199 y = Double.MAX_VALUE; |
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200 } |
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201 inputs.add(Double.valueOf(ys.getQuick(i) - y)); |
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202 } |
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203 |
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MINFO: Allow two methods for outlier test in SQ relation.
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204 Integer outlier = GrubbsOutlier.findOutlier(inputs); |
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205 |
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206 if (outlier == null) { |
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207 break; |
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208 } |
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209 |
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210 int idx = outlier.intValue(); |
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211 removed.add( |
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212 qwdFactory.create( |
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213 xs.getQuick(idx), ys.getQuick(idx))); |
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214 xs.remove(idx); |
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215 ys.remove(idx); |
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216 } |
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217 |
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FixA: Store the standard deviation of delta Ws of reference points into parameters, too.
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218 StandardDeviation stdDev = new StandardDeviation(); |
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219 |
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220 referenced = new QWD[xs.size()]; |
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FixA: Store the referenced QW for each km, too.
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221 for (int i = 0; i < referenced.length; ++i) { |
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222 QWD qwd = qwdFactory.create(xs.getQuick(i), ys.getQuick(i)); |
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Some minor bugfixes in fix analysis calculation and some more debug output.
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223 |
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224 if (qwd == null) { |
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225 log.warn("QW creation failed!"); |
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226 } |
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227 else { |
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228 referenced[i] = qwd; |
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229 double dw = (qwd.getW() - instance.value(qwd.getQ()))*100.0; |
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230 qwd.setDeltaW(dw); |
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231 stdDev.increment(dw); |
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232 } |
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233 } |
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234 |
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235 standardDeviation = stdDev.getResult(); |
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236 |
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237 chiSqr = lmo.getChiSquare(); |
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238 |
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239 return true; |
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240 } |
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241 } |
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242 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |