Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartHelper.java @ 3259:9422b559b2d5
Added vim lines.
flys-artifacts/trunk@4896 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 08 Jul 2012 08:52:15 +0000 |
parents | 638b1da85450 |
children | b2ea89a665bc |
rev | line source |
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1 package de.intevation.flys.exports; |
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2 |
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3 import org.jfree.data.Range; |
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4 import org.jfree.data.xy.XYDataset; |
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5 import org.jfree.data.xy.XYSeriesCollection; |
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6 import org.jfree.data.time.RegularTimePeriod; |
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7 import org.jfree.data.time.TimeSeriesCollection; |
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8 import org.jfree.data.time.TimeSeries; |
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9 |
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10 import org.apache.log4j.Logger; |
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11 |
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12 import de.intevation.flys.jfree.Bounds; |
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13 import de.intevation.flys.jfree.DoubleBounds; |
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14 import de.intevation.flys.jfree.TimeBounds; |
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15 |
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16 |
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17 /** |
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18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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19 */ |
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20 public class ChartHelper { |
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21 |
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22 private static final Logger logger = Logger.getLogger(ChartHelper.class); |
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23 |
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24 |
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25 /** |
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26 * This method returns the ranges of the XYDataset <i>dataset</i> as array |
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27 * with [xrange, yrange]. |
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28 * |
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29 * @param dataset The dataset which should be evaluated. |
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30 * |
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31 * @return an array with x and y ranges. |
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32 */ |
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33 public static Bounds[] getBounds(XYSeriesCollection dataset) { |
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34 int seriesCount = dataset != null ? dataset.getSeriesCount() : 0; |
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35 |
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36 if (seriesCount == 0) { |
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37 logger.warn("Dataset is empty or has no Series set."); |
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38 return null; |
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39 } |
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40 |
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41 boolean foundValue = false; |
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42 |
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43 double minX = Double.MAX_VALUE; |
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44 double maxX = -Double.MAX_VALUE; |
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45 double minY = Double.MAX_VALUE; |
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46 double maxY = -Double.MAX_VALUE; |
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47 |
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48 for (int i = 0, m = seriesCount; i < m; i++) { |
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49 for (int j = 0, n = dataset.getItemCount(i); j < n; j++) { |
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50 double x = dataset.getXValue(i, j); |
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51 double y = dataset.getYValue(i, j); |
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52 |
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53 if (Double.isNaN(x) || Double.isNaN(y)) { |
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54 logger.warn("Item " + j + " in Series " + i + " is broken"); |
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55 continue; |
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56 } |
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57 |
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58 foundValue = true; |
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59 |
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60 if (x < minX) { |
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61 minX = x; |
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62 } |
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63 |
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64 if (x > maxX) { |
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65 maxX = x; |
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66 } |
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67 |
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68 if (y < minY) { |
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69 minY = y; |
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70 } |
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71 |
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72 if (y > maxY) { |
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73 maxY = y; |
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74 } |
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75 } |
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76 } |
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77 |
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78 return foundValue |
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79 ? new Bounds[] { |
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80 new DoubleBounds(minX, maxX), |
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81 new DoubleBounds(minY, maxY) } |
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82 : null; |
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83 } |
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84 |
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85 |
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86 public static Bounds[] getBounds(XYDataset dataset) { |
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87 if (dataset instanceof XYSeriesCollection) { |
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88 return getBounds((XYSeriesCollection) dataset); |
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89 } |
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90 else if(dataset instanceof TimeSeriesCollection) { |
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91 return getBounds((TimeSeriesCollection) dataset); |
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92 } |
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93 else { |
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94 logger.warn("Unknown XYDataset instance: " + dataset.getClass()); |
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95 return null; |
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96 } |
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97 } |
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98 |
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99 |
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100 public static Bounds[] getBounds(TimeSeriesCollection collection) { |
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101 int seriesCount = collection != null ? collection.getSeriesCount() : 0; |
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102 |
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103 if (seriesCount == 0) { |
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104 logger.warn("TimeSeriesCollection is empty or has no Series set."); |
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105 return null; |
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106 } |
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107 |
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108 boolean foundValue = false; |
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109 |
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110 long lowerX = Long.MAX_VALUE; |
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111 long upperX = -Long.MAX_VALUE; |
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112 |
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113 double lowerY = Double.MAX_VALUE; |
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114 double upperY = -Double.MAX_VALUE; |
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115 |
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116 for (int i = 0, m = seriesCount; i < m; i++) { |
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117 TimeSeries series = collection.getSeries(i); |
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118 |
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119 for (int j = 0, n = collection.getItemCount(i); j < n; j++) { |
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120 RegularTimePeriod rtp = series.getTimePeriod(j); |
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121 |
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122 if (rtp == null) { |
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123 continue; |
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124 } |
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125 |
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126 foundValue = true; |
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127 |
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128 long start = rtp.getFirstMillisecond(); |
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129 long end = rtp.getLastMillisecond(); |
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130 |
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131 if (start < lowerX) { |
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132 lowerX = start; |
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133 } |
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134 |
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135 if (end > upperX) { |
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136 upperX = end; |
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137 } |
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138 |
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139 double y = series.getValue(j).doubleValue(); |
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140 |
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141 lowerY = Math.min(lowerY, y); |
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142 upperY = Math.max(upperY, y); |
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143 } |
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144 } |
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145 |
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146 if (foundValue) { |
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147 return new Bounds[] { |
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148 new TimeBounds(lowerX, upperX), |
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149 new DoubleBounds(lowerY, upperY) |
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150 }; |
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151 } |
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152 |
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153 return null; |
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154 } |
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155 |
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156 |
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157 /** |
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158 * Expand bounds by percent. |
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159 * |
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160 * @param bounds The bounds to expand. |
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161 * @param percent The percentage to expand. |
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162 * |
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163 * @param a new, expanded bounds. |
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164 */ |
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165 public static Bounds expandBounds(Bounds bounds, double percent) { |
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166 if (bounds == null) { |
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167 return null; |
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168 } |
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169 |
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170 double value = (Double) bounds.getLower(); |
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171 double expand = Math.abs(value / 100 * percent); |
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172 |
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173 return expand != 0 |
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174 ? new DoubleBounds(value-expand, value+expand) |
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175 : new DoubleBounds(-0.01 * percent, 0.01 * percent); |
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176 } |
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177 |
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178 |
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179 /** |
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180 * Expand range by percent. |
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181 * |
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182 * @param range The range to expand. |
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183 * @param percent The percentage to expand. |
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184 * |
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185 * @param a new, expanded range. |
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186 */ |
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187 public static Range expandRange(Range range, double percent) { |
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188 if (range == null) { |
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189 return null; |
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190 } |
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191 |
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192 double value = range.getLowerBound(); |
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193 double expand = Math.abs(value / 100 * percent); |
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194 |
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195 return expand != 0 |
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196 ? new Range(value-expand, value+expand) |
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197 : new Range(-0.01 * percent, 0.01 * percent); |
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198 } |
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199 } |
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200 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |