Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/fixings/FixATWriter.java @ 6325:ee701de9c875

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Add special case handling for Fixing AT export at a gauge
author Andre Heinecke <aheinecke@intevation.de>
date Thu, 13 Jun 2013 11:43:02 +0200
parents 1642e08d14d2
children 65a5deaee769
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.exports.fixings;
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10
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11 import org.dive4elements.artifacts.CallMeta;
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12
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13 import org.dive4elements.river.artifacts.math.fitting.Function;
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14
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15 import org.dive4elements.river.artifacts.model.Parameters;
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16
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17 import org.dive4elements.river.artifacts.resources.Resources;
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18
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19 import org.dive4elements.river.exports.ATWriter;
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20
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21 import org.dive4elements.river.model.Gauge;
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22 import org.dive4elements.river.model.River;
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23
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24 import java.io.IOException;
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25 import java.io.PrintWriter;
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26 import java.io.Writer;
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27
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28 import java.util.Locale;
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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 /** Export Fixation Analysis Results to AT. */
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33 public class FixATWriter
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34 {
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35 /** Private logger. */
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36 private static Logger log = Logger.getLogger(FixATWriter.class);
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37
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38 public static final String I18N_HEADER_KEY =
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39 "fix.export.at.header";
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40
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41 public static final String I18N_GAUGE_HEADER_KEY =
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42 "fix.export.at.gauge.header";
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43
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44 public static final String I18N_HEADER_DEFAULT =
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45 "Exported fixings discharge curve for {0} {0}-km: {1}";
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46
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47 public static final String I18N_GAUGE_HEADER_DEFAULT =
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48 "Exported fixings discharge curve for {0}, gauge: {1} datum[{3}] = {2}";
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49
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50 public static final String [] Q_MAX_COLUMN = new String [] { "max_q" };
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51
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52 private static final int MAX_ITERATIONS = 10000;
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53 private static final double EPSILON = 1e-8;
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54 private static final double MIN_Q = 1e-4;
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55
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56 protected Function function;
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57 protected Parameters parameters;
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58
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59 public FixATWriter() {
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60 }
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61
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62 public FixATWriter(Function function, Parameters parameters) {
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63 this.function = function;
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64 this.parameters = parameters;
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65 }
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66
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67 public void write(
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68 Writer writer,
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69 CallMeta meta,
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70 River river,
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71 double km
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72 )
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73 throws IOException {
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74 PrintWriter out = new PrintWriter(writer);
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75
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76 int subtractPNP = 0;
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77 // Special case handling for at's at gauges
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78 Gauge gauge = river.determineGaugeByPosition(km);
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79 if (Math.abs(km - gauge.getStation().doubleValue()) < 1e-4) {
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80 printGaugeHeader(out, meta, river, gauge);
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81 subtractPNP = (int)Math.round(gauge.getDatum().doubleValue() * 100);
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82 } else {
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83 printHeader(out, meta, river.getName(), km);
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84 }
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85
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86 double [] coeffs = parameters.interpolate(
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87 "km", km, function.getParameterNames());
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88
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89 double [] qMax = parameters.interpolate(
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90 "km", km, Q_MAX_COLUMN);
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91
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92 if (coeffs == null || qMax == null) {
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93 log.debug("No data found at km " + km + ".");
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94 return;
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95 }
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96
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97 org.dive4elements.river.artifacts.math.Function funcInst =
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98 function.instantiate(coeffs);
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99
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100 // Increase Q max about 5%.
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101 qMax[0] += Math.abs(qMax[0])*0.05;
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102
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103 double wMax = funcInst.value(qMax[0]);
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104
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105 if (Double.isNaN(wMax) || wMax < 0d) {
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106 log.debug("function '" + function.getName() +
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107 "' eval failed at " + wMax);
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108 return;
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109 }
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110
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111 Function inverse = function.getInverse();
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112
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113 org.dive4elements.river.artifacts.math.Function invInst =
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114 inverse.instantiate(coeffs);
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115
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116 double wMin = minW(invInst, wMax, qMax[0]);
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117
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118 double wMinCM = wMin * 100d;
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119 double wMaxCM = wMax * 100d;
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120
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121 int wRow = ((int)wMinCM / 10) * 10;
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122
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123 if ((wMinCM - (int)wMinCM) > 0d) {
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124 wMinCM = (int)wMinCM + 1d;
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125 }
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126
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127 double w = wMinCM / 100.0;
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128
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129 int wcm = ((int)wMinCM) % 10;
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130
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131 if (log.isDebugEnabled()) {
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132 log.debug("wMinCM: " + wMinCM);
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133 log.debug("wMaxCM: " + wMaxCM);
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134 log.debug("wcm: " + wcm);
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135 }
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136
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137 out.printf(Locale.US, "%8d", wRow - subtractPNP);
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138
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139 for (int i = 0; i < wcm; i++) {
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140 out.print(ATWriter.EMPTY);
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141 }
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142
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143 for (;;) {
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144 while (wcm++ < 10) {
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145 if (w > wMax) {
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146 break;
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147 }
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148 double q = invInst.value(w);
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149 if (Double.isNaN(w)) {
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150 out.print(ATWriter.EMPTY);
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151 }
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152 else {
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153 ATWriter.printQ(out, q);
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154 }
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155 w += 0.01d;
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156 }
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157 out.println();
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158 if (w > wMax) {
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159 break;
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160 }
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161 out.printf(Locale.US, "%8d", (wRow += 10) - subtractPNP);
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162 wcm = 0;
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163 }
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164
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165 out.flush();
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166 }
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167
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168 protected void printHeader(
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169 PrintWriter out,
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170 CallMeta meta,
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171 String river,
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172 double km
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173 ) {
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174 out.println("*" + Resources.format(
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175 meta,
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176 I18N_HEADER_KEY,
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177 I18N_HEADER_DEFAULT,
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178 river, km));
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179 }
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180
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181 protected void printGaugeHeader(
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182 PrintWriter out,
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183 CallMeta meta,
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184 River river,
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185 Gauge gauge
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186 ) {
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187 out.println("*" + Resources.format(
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188 meta,
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189 I18N_GAUGE_HEADER_KEY,
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190 I18N_GAUGE_HEADER_DEFAULT,
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191 new Object[] { river.getName(), gauge.getName(),
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192 gauge.getDatum(), river.getWstUnit().getName() }));
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193 }
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194
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195 private static double minW(
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196 org.dive4elements.river.artifacts.math.Function function,
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197 double maxW,
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198 double maxQ
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199 ) {
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200 double stepWidth = 10d;
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201
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202 double lastW = maxW;
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203 double lastQ = maxQ;
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204
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205 for (int i = 0; i < MAX_ITERATIONS; ++i) {
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206 double w = lastW - stepWidth;
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diff changeset
207 double q = function.value(w);
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208
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171db4d5d3cb FixA: AT export: prevent some numerical problems with steep functions around zero.
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diff changeset
209 if (Double.isNaN(q) || q > lastQ || q < MIN_Q) {
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diff changeset
210 if (stepWidth < EPSILON) {
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diff changeset
211 break;
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diff changeset
212 }
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diff changeset
213 stepWidth *= 0.5d;
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diff changeset
214 continue;
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diff changeset
215 }
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diff changeset
216
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217 lastW = w;
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218 lastQ = q;
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diff changeset
219 }
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220
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diff changeset
221 return lastW;
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diff changeset
222 }
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223 }
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diff changeset
224 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org