1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4EMDataSet.cc,v 1.20 2009/09/25 07:41:34 sincerti Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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29 | // |
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30 | // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) |
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31 | // |
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32 | // History: |
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33 | // ----------- |
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34 | // 31 Jul 2001 MGP Created |
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35 | // |
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36 | // 15 Jul 2009 Nicolas A. Karakatsanis |
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37 | // |
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38 | // - New Constructor was added when logarithmic data are loaded as well |
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39 | // to enhance CPU performance |
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40 | // |
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41 | // - Destructor was modified accordingly |
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42 | // |
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43 | // - LoadNonLogData method was created to load only the non-logarithmic data from G4EMLOW |
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44 | // dataset. It is essentially performing the data loading operations as in the past. |
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45 | // |
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46 | // - LoadData method was revised in order to calculate the logarithmic values of the data |
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47 | // It retrieves the data values from the G4EMLOW data files but, then, calculates the |
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48 | // respective log values and loads them to seperate data structures. |
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49 | // |
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50 | // - SetLogEnergiesData method was cretaed to set logarithmic values to G4 data vectors. |
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51 | // The EM data sets, initialized this way, contain both non-log and log values. |
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52 | // These initialized data sets can enhance the computing performance of data interpolation |
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53 | // operations |
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54 | // |
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55 | // |
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56 | // ------------------------------------------------------------------- |
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57 | |
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58 | #include "G4EMDataSet.hh" |
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59 | #include "G4VDataSetAlgorithm.hh" |
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60 | #include <fstream> |
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61 | #include <sstream> |
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62 | #include "G4Integrator.hh" |
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63 | #include "Randomize.hh" |
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64 | #include "G4LinInterpolation.hh" |
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65 | |
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66 | |
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67 | G4EMDataSet::G4EMDataSet(G4int Z, |
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68 | G4VDataSetAlgorithm* algo, |
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69 | G4double xUnit, |
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70 | G4double yUnit, |
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71 | G4bool random): |
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72 | z(Z), |
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73 | energies(0), |
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74 | data(0), |
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75 | log_energies(0), |
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76 | log_data(0), |
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77 | algorithm(algo), |
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78 | unitEnergies(xUnit), |
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79 | unitData(yUnit), |
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80 | pdf(0), |
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81 | randomSet(random) |
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82 | { |
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83 | if (algorithm == 0) G4Exception("G4EMDataSet::G4EMDataSet - interpolation == 0"); |
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84 | if (randomSet) BuildPdf(); |
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85 | } |
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86 | |
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87 | G4EMDataSet::G4EMDataSet(G4int argZ, |
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88 | G4DataVector* dataX, |
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89 | G4DataVector* dataY, |
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90 | G4VDataSetAlgorithm* algo, |
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91 | G4double xUnit, |
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92 | G4double yUnit, |
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93 | G4bool random): |
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94 | z(argZ), |
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95 | energies(dataX), |
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96 | data(dataY), |
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97 | log_energies(0), |
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98 | log_data(0), |
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99 | algorithm(algo), |
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100 | unitEnergies(xUnit), |
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101 | unitData(yUnit), |
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102 | pdf(0), |
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103 | randomSet(random) |
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104 | { |
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105 | if (algorithm == 0) G4Exception("G4EMDataSet::G4EMDataSet - interpolation == 0"); |
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106 | |
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107 | if ((energies == 0) ^ (data == 0)) |
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108 | G4Exception("G4EMDataSet::G4EMDataSet - different size for energies and data (zero case)"); |
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109 | |
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110 | if (energies == 0) return; |
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111 | |
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112 | if (energies->size() != data->size()) |
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113 | G4Exception("G4EMDataSet::G4EMDataSet - different size for energies and data"); |
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114 | |
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115 | if (randomSet) BuildPdf(); |
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116 | } |
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117 | |
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118 | G4EMDataSet::G4EMDataSet(G4int argZ, |
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119 | G4DataVector* dataX, |
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120 | G4DataVector* dataY, |
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121 | G4DataVector* dataLogX, |
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122 | G4DataVector* dataLogY, |
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123 | G4VDataSetAlgorithm* algo, |
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124 | G4double xUnit, |
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125 | G4double yUnit, |
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126 | G4bool random): |
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127 | z(argZ), |
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128 | energies(dataX), |
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129 | data(dataY), |
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130 | log_energies(dataLogX), |
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131 | log_data(dataLogY), |
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132 | algorithm(algo), |
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133 | unitEnergies(xUnit), |
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134 | unitData(yUnit), |
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135 | pdf(0), |
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136 | randomSet(random) |
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137 | { |
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138 | if (algorithm == 0) G4Exception("G4EMDataSet::G4EMDataSet - interpolation == 0"); |
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139 | |
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140 | if ((energies == 0) ^ (data == 0)) |
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141 | G4Exception("G4EMDataSet::G4EMDataSet - different size for energies and data (zero case)"); |
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142 | |
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143 | if (energies == 0) return; |
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144 | |
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145 | if (energies->size() != data->size()) |
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146 | G4Exception("G4EMDataSet::G4EMDataSet - different size for energies and data"); |
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147 | |
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148 | if ((log_energies == 0) ^ (log_data == 0)) |
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149 | G4Exception("G4EMDataSet::G4EMDataSet - different size for log energies and log data (zero case)"); |
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150 | |
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151 | if (log_energies == 0) return; |
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152 | |
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153 | if (log_energies->size() != log_data->size()) |
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154 | G4Exception("G4EMDataSet::G4EMDataSet - different size for log energies and log data"); |
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155 | |
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156 | if (randomSet) BuildPdf(); |
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157 | } |
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158 | |
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159 | |
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160 | G4EMDataSet::~G4EMDataSet() |
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161 | { |
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162 | delete algorithm; |
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163 | if (energies) delete energies; |
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164 | if (data) delete data; |
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165 | if (pdf) delete pdf; |
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166 | if (log_energies) delete log_energies; |
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167 | if (log_data) delete log_data; |
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168 | } |
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169 | |
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170 | |
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171 | G4double G4EMDataSet::FindValue(G4double energy, G4int /* componentId */) const |
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172 | { |
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173 | if (!energies) G4Exception("G4EMDataSet::FindValue - energies == 0"); |
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174 | if (energies->empty()) return 0; |
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175 | if (energy <= (*energies)[0]) return (*data)[0]; |
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176 | |
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177 | size_t i = energies->size()-1; |
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178 | if (energy >= (*energies)[i]) return (*data)[i]; |
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179 | |
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180 | //Nicolas A. Karakatsanis: Check if the logarithmic data have been loaded to decide |
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181 | // which Interpolation-Calculation method will be applied |
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182 | if (log_energies != 0) |
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183 | { |
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184 | return algorithm->Calculate(energy, FindLowerBound(energy), *energies, *data, *log_energies, *log_data); |
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185 | } |
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186 | |
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187 | return algorithm->Calculate(energy, FindLowerBound(energy), *energies, *data); |
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188 | } |
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189 | |
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190 | |
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191 | void G4EMDataSet::PrintData(void) const |
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192 | { |
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193 | if (!energies) |
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194 | { |
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195 | G4cout << "Data not available." << G4endl; |
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196 | } |
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197 | else |
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198 | { |
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199 | size_t size = energies->size(); |
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200 | for (size_t i(0); i<size; i++) |
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201 | { |
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202 | G4cout << "Point: " << ((*energies)[i]/unitEnergies) |
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203 | << " - Data value: " << ((*data)[i]/unitData); |
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204 | if (pdf != 0) G4cout << " - PDF : " << (*pdf)[i]; |
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205 | G4cout << G4endl; |
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206 | } |
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207 | } |
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208 | } |
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209 | |
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210 | |
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211 | void G4EMDataSet::SetEnergiesData(G4DataVector* dataX, |
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212 | G4DataVector* dataY, |
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213 | G4int /* componentId */) |
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214 | { |
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215 | if (energies) delete energies; |
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216 | energies = dataX; |
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217 | |
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218 | if (data) delete data; |
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219 | data = dataY; |
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220 | |
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221 | if ((energies == 0) ^ (data==0)) |
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222 | G4Exception("G4EMDataSet::SetEnergiesData - different size for energies and data (zero case)"); |
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223 | |
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224 | if (energies == 0) return; |
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225 | |
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226 | //G4cout << "Size of energies: " << energies->size() << G4endl << "Size of data: " << data->size() << G4endl; |
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227 | if (energies->size() != data->size()) |
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228 | G4Exception("G4EMDataSet::SetEnergiesData - different size for energies and data"); |
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229 | } |
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230 | |
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231 | void G4EMDataSet::SetLogEnergiesData(G4DataVector* dataX, |
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232 | G4DataVector* dataY, |
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233 | G4DataVector* data_logX, |
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234 | G4DataVector* data_logY, |
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235 | G4int /* componentId */) |
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236 | { |
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237 | //Load of the actual energy and data values |
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238 | if (energies) delete energies; |
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239 | energies = dataX; |
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240 | if (data) delete data; |
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241 | data = dataY; |
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242 | |
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243 | //Check if data loaded properly from data files |
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244 | if ((energies == 0) ^ (data==0)) |
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245 | G4Exception("G4EMDataSet::SetLogEnergiesData - different size for energies and data (zero case)"); |
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246 | |
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247 | if (energies == 0) return; |
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248 | |
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249 | //G4cout << "Size of energies: " << energies->size() << G4endl << "Size of data: " << data->size() << G4endl << G4endl; |
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250 | if (energies->size() != data->size()) |
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251 | G4Exception("G4EMDataSet::SetLogEnergiesData - different size for energies and data"); |
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252 | |
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253 | //Load of the logarithmic energy and data values |
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254 | if (log_energies) delete log_energies; |
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255 | log_energies = data_logX; |
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256 | if (log_data) delete log_data; |
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257 | log_data = data_logY; |
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258 | |
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259 | //Check if logarithmic data loaded properly from data files |
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260 | if ((log_energies == 0) ^ (log_data==0)) |
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261 | G4Exception("G4EMDataSet::SetLogEnergiesData - different size for log energies and log data (zero case)"); |
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262 | |
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263 | if (log_energies == 0) G4cout << "G4EMDataSet::SetLogEnergiesData - log_energies == 0" << G4endl; |
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264 | if (log_energies == 0) return; |
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265 | |
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266 | //G4cout << "Size of log energies: " << log_energies->size() << G4endl << "Size of log data: " << log_data->size() << G4endl << G4endl; |
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267 | if (log_energies->size() != log_data->size()) |
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268 | G4Exception("G4EMDataSet::SetLogEnergiesData - different size for log energies and log data"); |
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269 | } |
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270 | |
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271 | |
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272 | |
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273 | G4bool G4EMDataSet::LoadData(const G4String& fileName) |
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274 | { |
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275 | // The file is organized into four columns: |
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276 | // 1st column contains the values of energy |
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277 | // 2nd column contains the corresponding data value |
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278 | // The file terminates with the pattern: -1 -1 |
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279 | // -2 -2 |
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280 | |
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281 | G4String fullFileName(FullFileName(fileName)); |
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282 | std::ifstream in(fullFileName); |
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283 | |
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284 | if (!in.is_open()) |
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285 | { |
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286 | G4String message("G4EMDataSet::LoadData - data file \""); |
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287 | message += fullFileName; |
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288 | message += "\" not found"; |
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289 | G4Exception(message); |
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290 | } |
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291 | |
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292 | G4DataVector* argEnergies=new G4DataVector; |
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293 | G4DataVector* argData=new G4DataVector; |
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294 | G4DataVector* argLogEnergies=new G4DataVector; |
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295 | G4DataVector* argLogData=new G4DataVector; |
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296 | |
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297 | G4double a; |
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298 | G4int k = 0; |
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299 | G4int nColumns = 2; |
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300 | |
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301 | do |
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302 | { |
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303 | in >> a; |
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304 | |
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305 | if (a==0.) a=1e-300; |
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306 | |
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307 | if (a != -1 && a != -2) |
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308 | { |
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309 | if (k%nColumns == 0) |
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310 | { |
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311 | argEnergies->push_back(a*unitEnergies); |
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312 | argLogEnergies->push_back(std::log10(a)+std::log10(unitEnergies)); |
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313 | } |
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314 | else if (k%nColumns == 1) |
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315 | { |
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316 | argData->push_back(a*unitData); |
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317 | argLogData->push_back(std::log10(a)+std::log10(unitData)); |
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318 | } |
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319 | k++; |
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320 | } |
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321 | } |
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322 | while (a != -2); |
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323 | |
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324 | |
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325 | SetLogEnergiesData(argEnergies, argData, argLogEnergies, argLogData, 0); |
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326 | |
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327 | if (randomSet) BuildPdf(); |
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328 | |
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329 | return true; |
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330 | } |
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331 | |
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332 | |
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333 | G4bool G4EMDataSet::LoadNonLogData(const G4String& fileName) |
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334 | { |
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335 | // The file is organized into four columns: |
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336 | // 1st column contains the values of energy |
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337 | // 2nd column contains the corresponding data value |
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338 | // The file terminates with the pattern: -1 -1 |
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339 | // -2 -2 |
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340 | |
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341 | G4String fullFileName(FullFileName(fileName)); |
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342 | std::ifstream in(fullFileName); |
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343 | if (!in.is_open()) |
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344 | { |
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345 | G4String message("G4EMDataSet::LoadData - data file \""); |
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346 | message += fullFileName; |
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347 | message += "\" not found"; |
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348 | G4Exception(message); |
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349 | } |
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350 | |
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351 | G4DataVector* argEnergies=new G4DataVector; |
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352 | G4DataVector* argData=new G4DataVector; |
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353 | |
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354 | G4double a; |
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355 | G4int k = 0; |
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356 | G4int nColumns = 2; |
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357 | |
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358 | do |
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359 | { |
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360 | in >> a; |
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361 | |
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362 | if (a != -1 && a != -2) |
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363 | { |
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364 | if (k%nColumns == 0) |
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365 | { |
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366 | argEnergies->push_back(a*unitEnergies); |
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367 | } |
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368 | else if (k%nColumns == 1) |
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369 | { |
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370 | argData->push_back(a*unitData); |
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371 | } |
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372 | k++; |
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373 | } |
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374 | } |
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375 | while (a != -2); |
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376 | |
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377 | SetEnergiesData(argEnergies, argData, 0); |
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378 | |
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379 | if (randomSet) BuildPdf(); |
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380 | |
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381 | return true; |
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382 | } |
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383 | |
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384 | |
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385 | |
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386 | G4bool G4EMDataSet::SaveData(const G4String& name) const |
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387 | { |
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388 | // The file is organized into two columns: |
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389 | // 1st column is the energy |
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390 | // 2nd column is the corresponding value |
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391 | // The file terminates with the pattern: -1 -1 |
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392 | // -2 -2 |
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393 | |
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394 | G4String fullFileName(FullFileName(name)); |
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395 | std::ofstream out(fullFileName); |
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396 | |
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397 | if (!out.is_open()) |
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398 | { |
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399 | G4String message("G4EMDataSet::SaveData - cannot open \""); |
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400 | message+=fullFileName; |
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401 | message+="\""; |
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402 | G4Exception(message); |
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403 | } |
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404 | |
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405 | out.precision(10); |
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406 | out.width(15); |
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407 | out.setf(std::ofstream::left); |
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408 | |
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409 | if (energies!=0 && data!=0) |
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410 | { |
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411 | G4DataVector::const_iterator i(energies->begin()); |
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412 | G4DataVector::const_iterator endI(energies->end()); |
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413 | G4DataVector::const_iterator j(data->begin()); |
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414 | |
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415 | while (i!=endI) |
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416 | { |
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417 | out.precision(10); |
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418 | out.width(15); |
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419 | out.setf(std::ofstream::left); |
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420 | out << ((*i)/unitEnergies) << ' '; |
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421 | |
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422 | out.precision(10); |
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423 | out.width(15); |
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424 | out.setf(std::ofstream::left); |
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425 | out << ((*j)/unitData) << std::endl; |
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426 | |
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427 | i++; |
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428 | j++; |
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429 | } |
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430 | } |
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431 | |
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432 | out.precision(10); |
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433 | out.width(15); |
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434 | out.setf(std::ofstream::left); |
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435 | out << -1.f << ' '; |
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436 | |
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437 | out.precision(10); |
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438 | out.width(15); |
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439 | out.setf(std::ofstream::left); |
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440 | out << -1.f << std::endl; |
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441 | |
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442 | out.precision(10); |
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443 | out.width(15); |
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444 | out.setf(std::ofstream::left); |
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445 | out << -2.f << ' '; |
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446 | |
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447 | out.precision(10); |
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448 | out.width(15); |
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449 | out.setf(std::ofstream::left); |
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450 | out << -2.f << std::endl; |
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451 | |
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452 | return true; |
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453 | } |
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454 | |
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455 | |
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456 | |
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457 | size_t G4EMDataSet::FindLowerBound(G4double x) const |
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458 | { |
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459 | size_t lowerBound = 0; |
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460 | size_t upperBound(energies->size() - 1); |
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461 | |
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462 | while (lowerBound <= upperBound) |
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463 | { |
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464 | size_t midBin((lowerBound + upperBound) / 2); |
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465 | |
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466 | if (x < (*energies)[midBin]) upperBound = midBin - 1; |
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467 | else lowerBound = midBin + 1; |
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468 | } |
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469 | |
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470 | return upperBound; |
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471 | } |
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472 | |
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473 | |
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474 | size_t G4EMDataSet::FindLowerBound(G4double x, G4DataVector* values) const |
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475 | { |
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476 | size_t lowerBound = 0;; |
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477 | size_t upperBound(values->size() - 1); |
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478 | |
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479 | while (lowerBound <= upperBound) |
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480 | { |
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481 | size_t midBin((lowerBound + upperBound) / 2); |
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482 | |
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483 | if (x < (*values)[midBin]) upperBound = midBin - 1; |
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484 | else lowerBound = midBin + 1; |
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485 | } |
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486 | |
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487 | return upperBound; |
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488 | } |
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489 | |
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490 | |
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491 | G4String G4EMDataSet::FullFileName(const G4String& name) const |
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492 | { |
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493 | char* path = getenv("G4LEDATA"); |
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494 | if (!path) |
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495 | G4Exception("G4EMDataSet::FullFileName - G4LEDATA environment variable not set"); |
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496 | |
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497 | std::ostringstream fullFileName; |
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498 | fullFileName << path << '/' << name << z << ".dat"; |
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499 | |
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500 | return G4String(fullFileName.str().c_str()); |
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501 | } |
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502 | |
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503 | |
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504 | |
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505 | void G4EMDataSet::BuildPdf() |
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506 | { |
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507 | pdf = new G4DataVector; |
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508 | G4Integrator <G4EMDataSet, G4double(G4EMDataSet::*)(G4double)> integrator; |
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509 | |
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510 | G4int nData = data->size(); |
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511 | pdf->push_back(0.); |
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512 | |
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513 | // Integrate the data distribution |
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514 | G4int i; |
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515 | G4double totalSum = 0.; |
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516 | for (i=1; i<nData; i++) |
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517 | { |
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518 | G4double xLow = (*energies)[i-1]; |
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519 | G4double xHigh = (*energies)[i]; |
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520 | G4double sum = integrator.Legendre96(this, &G4EMDataSet::IntegrationFunction, xLow, xHigh); |
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521 | totalSum = totalSum + sum; |
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522 | pdf->push_back(totalSum); |
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523 | } |
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524 | |
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525 | // Normalize to the last bin |
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526 | G4double tot = 0.; |
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527 | if (totalSum > 0.) tot = 1. / totalSum; |
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528 | for (i=1; i<nData; i++) |
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529 | { |
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530 | (*pdf)[i] = (*pdf)[i] * tot; |
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531 | } |
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532 | } |
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533 | |
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534 | |
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535 | G4double G4EMDataSet::RandomSelect(G4int /* componentId */) const |
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536 | { |
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537 | // Random select a X value according to the cumulative probability distribution |
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538 | // derived from the data |
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539 | |
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540 | if (!pdf) G4Exception("G4EMDataSet::RandomSelect - PDF has not been created for this data set"); |
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541 | |
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542 | G4double value = 0.; |
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543 | G4double x = G4UniformRand(); |
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544 | |
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545 | // Locate the random value in the X vector based on the PDF |
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546 | size_t bin = FindLowerBound(x,pdf); |
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547 | |
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548 | // Interpolate the PDF to calculate the X value: |
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549 | // linear interpolation in the first bin (to avoid problem with 0), |
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550 | // interpolation with associated data set algorithm in other bins |
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551 | |
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552 | G4LinInterpolation linearAlgo; |
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553 | if (bin == 0) value = linearAlgo.Calculate(x, bin, *pdf, *energies); |
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554 | else value = algorithm->Calculate(x, bin, *pdf, *energies); |
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555 | |
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556 | // G4cout << x << " random bin "<< bin << " - " << value << G4endl; |
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557 | return value; |
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558 | } |
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559 | |
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560 | G4double G4EMDataSet::IntegrationFunction(G4double x) |
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561 | { |
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562 | // This function is needed by G4Integrator to calculate the integral of the data distribution |
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563 | |
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564 | G4double y = 0; |
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565 | |
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566 | // Locate the random value in the X vector based on the PDF |
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567 | size_t bin = FindLowerBound(x); |
---|
568 | |
---|
569 | // Interpolate to calculate the X value: |
---|
570 | // linear interpolation in the first bin (to avoid problem with 0), |
---|
571 | // interpolation with associated algorithm in other bins |
---|
572 | |
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573 | G4LinInterpolation linearAlgo; |
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574 | |
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575 | if (bin == 0) y = linearAlgo.Calculate(x, bin, *energies, *data); |
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576 | else y = algorithm->Calculate(x, bin, *energies, *data); |
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577 | |
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578 | return y; |
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579 | } |
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580 | |
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