1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2006 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_RANDOM_H |
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20 | #define LEMON_RANDOM_H |
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21 | |
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22 | #include<iostream> |
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23 | #include<fstream> |
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24 | #include<string> |
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25 | |
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26 | #include <lemon/dim2.h> |
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27 | |
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28 | ///\ingroup misc |
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29 | ///\file |
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30 | ///\brief Measure a Distribution |
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31 | /// |
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32 | ///\todo Needs lot more docs |
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33 | /// |
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34 | |
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35 | |
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36 | namespace lemon { |
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37 | |
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38 | ///Measure a distribution |
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39 | class DistLog |
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40 | { |
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41 | std::vector<int> _dist; |
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42 | double _lo,_up; |
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43 | int _count; |
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44 | bool _cut; |
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45 | public: |
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46 | ///\e |
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47 | Dist(double lo,double up,int gr,bool cut=true) |
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48 | : _dist(gr,0),_lo(lo),_up(up),_count(0),_cut(cut) {} |
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49 | ///\e |
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50 | void operator()(double v) |
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51 | { |
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52 | if(_cut) { |
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53 | if(_lo<=v && v<_up) |
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54 | _dist[int((v-_lo)/(_up-_lo)*_dist.size())]++; |
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55 | } |
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56 | else { |
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57 | _dist[std::max(0,std::min(int(_dist.size())-1, |
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58 | int((v-_lo)/(_up-_lo)*_dist.size()) |
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59 | ))]++; |
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60 | } |
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61 | _count++; |
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62 | } |
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63 | ///\e |
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64 | void dump(std::ostream& os=std::cout) |
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65 | { |
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66 | for(int i=0;i<_dist.size();i++) |
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67 | os << _lo+(i+0.5)*(_up-_lo)/_dist.size() << ' ' |
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68 | << double(_dist[i])/_count << std::endl; |
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69 | } |
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70 | ///\e |
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71 | void dump(const std::string& file_name) |
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72 | { |
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73 | dump(std::ofstream(file_name.c_str())); |
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74 | } |
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75 | }; |
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76 | |
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77 | ///Measure a two dimensional distribution |
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78 | class DistLog2 |
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79 | { |
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80 | public: |
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81 | typedef dim2::Point<double> Point; |
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82 | private: |
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83 | std::vector<int> _dist; |
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84 | int _gr; |
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85 | Point _lo,_up; |
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86 | int _count; |
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87 | bool _cut; |
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88 | public: |
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89 | ///\e |
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90 | Dist2(Point a,Point b,int gr,bool cut=true) : |
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91 | _dist(gr*gr,0),_gr(gr), |
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92 | _lo(a),_up(b),_count(0),_cut(cut) {} |
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93 | ///\e |
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94 | Dist2(double lox,double upx,double loy,double upy,int gr,bool cut=true) : |
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95 | _dist(gr*gr,0),_gr(gr), |
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96 | _lo(Point(lox,loy)),_up(Point(upx,upy)),_count(0),_cut(cut) {} |
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97 | ///\e |
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98 | void operator()(Point v) |
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99 | { |
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100 | if(_cut) |
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101 | { |
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102 | if(v.x>=_lo.x && v.x<_up.x && v.y>=_lo.y && v.y<_up.y) |
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103 | _dist[int((v.x-_lo.x)/(_up.x-_lo.x)*_gr)*_gr+ |
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104 | int((v.y-_lo.y)/(_up.y-_lo.y)*_gr)]++; |
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105 | } |
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106 | else { |
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107 | _dist[std::max(0,std::min(_gr-1, |
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108 | int((v.x-_lo.x)/(_up.x-_lo.x)*_gr) |
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109 | ))*_gr+ |
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110 | std::max(0,std::min(_gr-1, |
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111 | int((v.y-_lo.y)/(_up.y-_lo.y)*_gr) |
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112 | )) |
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113 | ]++; |
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114 | } |
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115 | _count++; |
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116 | } |
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117 | ///\e |
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118 | void dump(std::ostream& os=std::cout) |
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119 | { |
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120 | for(int i=0;i<_gr;i++) |
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121 | { |
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122 | for(int j=0;j<_gr;j++) |
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123 | os << _lo.x+(i+0.5)*(_up.x-_lo.x)/_gr << ' ' |
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124 | << _lo.y+(j+0.5)*(_up.y-_lo.y)/_gr << ' ' |
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125 | << double(_dist[i*_gr+j])/_count << std::endl; |
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126 | os << std::endl; |
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127 | } |
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128 | } |
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129 | ///\e |
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130 | void dump(const std::string& file_name) |
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131 | { |
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132 | dump(std::ofstream(file_name.c_str())); |
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133 | } |
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134 | }; |
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135 | } |
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136 | |
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137 | #endif |
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