Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java @ 3435:262e7d7e58fe

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FixA: Made curve fitting over the given calculation range reusable. Removed dead code. flys-artifacts/trunk@5098 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 22 Jul 2012 10:38:30 +0000
parents 1a636be7612b
children e111902834d3
rev   line source
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da7cf0e3ccaa FixA: Created a common base class for the fixing related calculations.
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parents:
diff changeset
1 package de.intevation.flys.artifacts.model.fixings;
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2
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parents: 3434
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3 import de.intevation.artifacts.common.utils.StringUtils;
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4
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5 import de.intevation.flys.artifacts.access.FixAccess;
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6
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parents: 3434
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7 import de.intevation.flys.artifacts.math.fitting.Function;
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8
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9 import de.intevation.flys.artifacts.model.Calculation;
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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
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13 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing.Filter;
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14
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15 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
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16 import de.intevation.flys.artifacts.model.FixingsOverview.IdsFilter;
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17
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18 import de.intevation.flys.artifacts.model.FixingsOverview;
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262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
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19 import de.intevation.flys.artifacts.model.Parameters;
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21 import de.intevation.flys.utils.DoubleUtil;
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22 import de.intevation.flys.utils.KMIndex;
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23
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24 import java.util.ArrayList;
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25 import java.util.Date;
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26 import java.util.HashMap;
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27 import java.util.List;
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28 import java.util.Map;
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29
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30 import org.apache.log4j.Logger;
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31
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32 public class FixCalculation
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33 extends Calculation
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34 {
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35 private static Logger log = Logger.getLogger(FixCalculation.class);
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36
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37 public static final double EPSILON = 1e-4;
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38
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39 public static final String [] STANDARD_COLUMNS = {
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parents: 3434
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40 "km", "chi_sqr", "max_q", "std-dev"
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
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parents: 3434
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41 };
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parents: 3434
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42
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
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parents: 3434
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43 protected static class FitResult {
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44
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
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parents: 3434
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45 protected Parameters parameters;
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46 protected KMIndex<QWD []> referenced;
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47 protected KMIndex<QW []> outliers;
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48
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parents: 3434
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49 public FitResult() {
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parents: 3434
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50 }
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parents: 3434
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51
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
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parents: 3434
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52 public FitResult(
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53 Parameters parameters,
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parents: 3434
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54 KMIndex<QWD []> referenced,
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parents: 3434
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55 KMIndex<QW []> outliers
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parents: 3434
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56 ) {
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parents: 3434
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57 this.parameters = parameters;
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parents: 3434
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58 this.referenced = referenced;
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59 this.outliers = outliers;
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parents: 3434
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60 }
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parents: 3434
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61
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62 public Parameters getParameters() {
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63 return parameters;
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parents: 3434
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64 }
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parents: 3434
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65
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66 public KMIndex<QWD []> getReferenced() {
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67 return referenced;
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68 }
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69
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70 public KMIndex<QW []> getOutliers() {
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71 return outliers;
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72 }
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73 } // class FitResult
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74
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75 /** Helper class to bundle the meta information of a column
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76 * and the real data.
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77 */
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78 protected static class Column {
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79
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80 protected Fixing.Column meta;
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81 protected FixingsColumn data;
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82
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83 public Column() {
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84 }
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85
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86 public Column(Fixing.Column meta, FixingsColumn data) {
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87 this.meta = meta;
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88 this.data = data;
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89 }
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90
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91 public Date getDate() {
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92 return meta.getStartTime();
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93 }
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94
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95 public String getDescription() {
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96 return meta.getDescription();
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97 }
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98
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99 public boolean getQW(
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100 double km,
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101 double [] qs,
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102 double [] ws,
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103 int index
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104 ) {
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105 qs[index] = data.getQ(km);
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106 return data.getW(km, ws, index);
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107 }
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108
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109 public boolean getQW(double km, double [] wq) {
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110 data.getW(km, wq, 0);
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111 if (Double.isNaN(wq[0])) return false;
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112 wq[1] = data.getQ(km);
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113 return !Double.isNaN(wq[1]);
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114 }
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115 } // class Column
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116
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117 /**
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118 * Helper class to find the data belonging to meta info more quickly.
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119 */
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120 protected static class ColumnCache {
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121
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122 protected Map<Integer, Column> columns;
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123
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124 public ColumnCache() {
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125 columns = new HashMap<Integer, Column>();
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126 }
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127
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128 public Column getColumn(Fixing.Column meta) {
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129 Integer key = meta.getId();
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130 Column column = columns.get(key);
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131 if (column == null) {
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132 FixingsColumn data = FixingsColumnFactory
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133 .getInstance()
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134 .getColumnData(meta);
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135 if (data != null) {
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136 column = new Column(meta, data);
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137 columns.put(key, column);
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138 }
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139 }
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140 return column;
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141 }
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142 } // class ColumnCache
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143
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144
3419
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145 protected String river;
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146 protected double from;
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147 protected double to;
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148 protected double step;
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149 protected boolean preprocessing;
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150 protected String function;
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151 protected int [] events;
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152 protected int qSectorStart;
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153 protected int qSectorEnd;
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154
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155 public FixCalculation() {
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156 }
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157
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158 public FixCalculation(FixAccess access) {
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159 String river = access.getRiver();
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160 Double from = access.getFrom();
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161 Double to = access.getTo();
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162 Double step = access.getStep();
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163 String function = access.getFunction();
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164 int [] events = access.getEvents();
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165 Integer qSectorStart = access.getQSectorStart();
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166 Integer qSectorEnd = access.getQSectorEnd();
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167 Boolean preprocessing = access.getPreprocessing();
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168
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169 if (river == null) {
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170 addProblem("fix.missing.river");
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171 }
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172
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173 if (from == null) {
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174 addProblem("fix.missing.from");
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175 }
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176
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177 if (to == null) {
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178 addProblem("fix.missing.to");
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179 }
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180
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181 if (step == null) {
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182 addProblem("fix.missing.step");
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183 }
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184
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185 if (function == null) {
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186 addProblem("fix.missing.function");
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187 }
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188
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189 if (events == null || events.length < 1) {
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190 addProblem("fix.missing.events");
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191 }
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192
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193 if (qSectorStart == null) {
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194 addProblem("fix.missing.qstart.sector");
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195 }
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196
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197 if (qSectorEnd == null) {
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198 addProblem("fix.missing.qend.sector");
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199 }
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200
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201 if (preprocessing == null) {
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202 addProblem("fix.missing.preprocessing");
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203 }
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204
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205 if (!hasProblems()) {
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206 this.river = river;
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207 this.from = from;
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208 this.to = to;
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209 this.step = step;
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210 this.function = function;
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211 this.events = events;
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212 this.qSectorStart = qSectorStart;
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213 this.qSectorEnd = qSectorEnd;
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214 this.preprocessing = preprocessing;
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215 }
3434
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216 }
3419
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217
3434
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218 protected static String toString(
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219 String [] parameterNames,
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220 double [] values
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221 ) {
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222 StringBuilder sb = new StringBuilder();
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223 for (int i = 0; i < parameterNames.length; ++i) {
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224 if (i > 0) sb.append(", ");
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225 sb.append(parameterNames[i]).append(": ").append(values[i]);
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226 }
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227 return sb.toString();
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228 }
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229
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230 protected Filter createFilter() {
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231 return new IdsFilter(events);
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232 }
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233
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234 protected List<Column> getEventColumns(FixingsOverview overview) {
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235
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236 FixingsColumnFactory fcf = FixingsColumnFactory.getInstance();
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237
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238 Filter filter = createFilter();
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239
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240 List<Fixing.Column> metas = overview.filter(null, filter);
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241
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242 List<Column> columns = new ArrayList<Column>(metas.size());
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243
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244 for (Fixing.Column meta: metas) {
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245
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246 FixingsColumn data = fcf.getColumnData(meta);
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247 if (data == null) {
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248 addProblem("fix.cannot.load.data");
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249 }
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250 else {
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251 columns.add(new Column(meta, data));
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252 }
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253 }
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254
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255 return columns;
3419
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parents:
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256 }
3435
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257
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258 protected FitResult doFitting(FixingsOverview overview, Function func) {
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259
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260 boolean debug = log.isDebugEnabled();
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261
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262 final List<Column> eventColumns = getEventColumns(overview);
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263
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264 if (eventColumns.size() < 2) {
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265 addProblem("fix.too.less.data.columns");
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266 return null;
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267 }
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268
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269 final double [] qs = new double[eventColumns.size()];
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270 final double [] ws = new double[qs.length];
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271 final boolean [] interpolated = new boolean[ws.length];
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272
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273 Fitting.QWDFactory qwdFactory = new Fitting.QWDFactory() {
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274 @Override
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275 public QWD create(double q, double w) {
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276 // Check all the event columns for close match
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277 // and take the description and the date from meta.
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278 for (int i = 0; i < qs.length; ++i) {
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279 if (Math.abs(qs[i]-q) < EPSILON
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280 && Math.abs(ws[i]-w) < EPSILON) {
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281 Column column = eventColumns.get(i);
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282 return new QWD(
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283 qs[i], ws[i],
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diff changeset
284 column.getDescription(),
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diff changeset
285 column.getDate(),
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diff changeset
286 interpolated[i],
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diff changeset
287 0d);
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288 }
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289 }
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diff changeset
290 log.warn("cannot find column for (" + q + ", " + w + ")");
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291 return new QWD(q, w);
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292 }
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293 };
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294
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295 Fitting fitting = new Fitting(func, qwdFactory, preprocessing);
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296
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297 String [] parameterNames = func.getParameterNames();
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298
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299 Parameters results =
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300 new Parameters(
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301 StringUtils.join(STANDARD_COLUMNS, parameterNames));
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302
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303 boolean invalid = false;
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304
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diff changeset
305 double [] kms = DoubleUtil.explode(from, to, step / 1000.0);
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306
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diff changeset
307 if (debug) {
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diff changeset
308 log.debug("number of kms: " + kms.length);
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309 }
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310
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311 KMIndex<QW []> outliers = new KMIndex<QW []>();
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diff changeset
312 KMIndex<QWD []> referenced = new KMIndex<QWD []>(kms.length);
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313
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314 int kmIndex = results.columnIndex("km");
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diff changeset
315 int chiSqrIndex = results.columnIndex("chi_sqr");
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diff changeset
316 int maxQIndex = results.columnIndex("max_q");
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diff changeset
317 int stdDevIndex = results.columnIndex("std-dev");
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diff changeset
318 int [] parameterIndices = results.columnIndices(parameterNames);
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319
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diff changeset
320 int numFailed = 0;
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321
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diff changeset
322 for (int i = 0; i < kms.length; ++i) {
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diff changeset
323 double km = kms[i];
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324
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diff changeset
325 // Fill Qs and Ws from event columns.
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diff changeset
326 for (int j = 0; j < ws.length; ++j) {
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diff changeset
327 interpolated[j] = !eventColumns.get(j).getQW(km, qs, ws, j);
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328 }
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diff changeset
329
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diff changeset
330 fitting.reset();
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331
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diff changeset
332 if (!fitting.fit(qs, ws)) {
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diff changeset
333 ++numFailed;
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diff changeset
334 addProblem(km, "fix.fitting.failed");
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diff changeset
335 continue;
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diff changeset
336 }
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337
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diff changeset
338 referenced.add(km, fitting.referencedToArray());
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339
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diff changeset
340 if (fitting.hasOutliers()) {
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diff changeset
341 outliers.add(km, fitting.outliersToArray());
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diff changeset
342 }
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diff changeset
343
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diff changeset
344 int row = results.newRow();
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diff changeset
345 double [] values = fitting.getParameters();
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346
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diff changeset
347 results.set(row, kmIndex, km);
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diff changeset
348 results.set(row, chiSqrIndex, fitting.getChiSquare());
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diff changeset
349 results.set(row, stdDevIndex, fitting.getStandardDeviation());
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diff changeset
350 results.set(row, maxQIndex, fitting.getMaxQ());
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
351 invalid |= results.set(row, parameterIndices, values);
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
352
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
353 if (debug) {
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
354 log.debug("km: "+km+" " + toString(parameterNames, values));
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
355 }
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
356 }
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
357
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
358 if (debug) {
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
359 log.debug("success: " + (kms.length - numFailed));
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
360 log.debug("failed: " + numFailed);
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
361 }
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
362
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
363 if (invalid) {
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
364 addProblem("fix.invalid.values");
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
365 results.removeNaNs();
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
366 }
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
367
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
368 outliers.sort();
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
369 referenced.sort();
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
370
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
371 return new FitResult(
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
372 results,
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
373 referenced,
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
374 outliers);
262e7d7e58fe FixA: Made curve fitting over the given calculation range reusable. Removed dead code.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3434
diff changeset
375 }
3419
da7cf0e3ccaa FixA: Created a common base class for the fixing related calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
376 }
da7cf0e3ccaa FixA: Created a common base class for the fixing related calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
377 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org