1 | #ifndef _theplu_yat_utility_vector_base_ |
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2 | #define _theplu_yat_utility_vector_base_ |
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3 | |
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4 | // $Id: VectorBase.h 1027 2008-02-02 21:29:29Z peter $ |
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5 | |
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6 | /* |
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7 | Copyright (C) 2003 Daniel Dalevi, Peter Johansson |
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8 | Copyright (C) 2004 Jari Häkkinen, Peter Johansson |
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9 | Copyright (C) 2005 Jari Häkkinen, Markus Ringnér, Peter Johansson |
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10 | Copyright (C) 2006 Jari Häkkinen, Markus Ringnér |
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11 | Copyright (C) 2007 Jari Häkkinen, Peter Johansson |
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12 | Copyright (C) 2008 Peter Johansson |
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13 | |
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14 | This file is part of the yat library, http://trac.thep.lu.se/trac/yat |
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15 | |
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16 | The yat library is free software; you can redistribute it and/or |
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17 | modify it under the terms of the GNU General Public License as |
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18 | published by the Free Software Foundation; either version 2 of the |
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19 | License, or (at your option) any later version. |
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20 | |
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21 | The yat library is distributed in the hope that it will be useful, |
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22 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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24 | General Public License for more details. |
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25 | |
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26 | You should have received a copy of the GNU General Public License |
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27 | along with this program; if not, write to the Free Software |
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28 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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29 | 02111-1307, USA. |
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30 | */ |
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31 | |
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32 | #include "Exception.h" |
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33 | #include "Iterator.h" |
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34 | |
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35 | #include <iostream> |
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36 | #include <vector> |
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37 | #include <utility> |
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38 | |
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39 | #include <gsl/gsl_vector.h> |
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40 | #include <gsl/gsl_sort_vector.h> |
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41 | |
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42 | namespace theplu { |
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43 | namespace yat { |
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44 | namespace utility { |
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45 | |
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46 | class matrix; |
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47 | class vector; |
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48 | |
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49 | /** |
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50 | @brief This is the yat interface to GSL vector. |
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51 | |
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52 | For time being 'double' is the only type supported. |
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53 | |
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54 | \par File streams: |
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55 | Reading and writing vectors to file streams are of course |
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56 | supported. These are implemented without using GSL functionality, |
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57 | and thus binary read and write to streams are not supported. |
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58 | |
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59 | \par Vector views: |
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60 | GSL vector views are supported and these are disguised as |
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61 | ordinary utility::vectors. A support function is added, |
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62 | utility::vector::isview(), that can be used to check if a vector |
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63 | object is a view. Note that view vectors do not own the |
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64 | underlying data, and a view is not valid if the vector/matrix |
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65 | owing the data is deallocated. |
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66 | |
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67 | \par |
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68 | Currently there is no restriction on how a vector is used when |
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69 | the vector is a const view into another vector or matrix. To |
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70 | avoid unexpected runtime errors, the programmer must declare |
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71 | const view vectors as 'const' in order to get compile time |
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72 | diagnostics about improper use of a const view vector object. If |
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73 | 'const' is not used and the const view vector is used erroneously |
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74 | (such as on the left hand side in assignments), the compiler will |
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75 | not catch the error and runtime error will occur. assert(3) is |
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76 | used to catch the runtime error during development. Example on |
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77 | bad and proper use of const view vectors: |
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78 | @code |
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79 | const vector vm(13,1.0); |
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80 | vector v1(vm,2,4); // bad code! not const! |
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81 | v1(0)=-123; // accepted by compiler, runtime abort will occur |
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82 | // or catched by assert depending on compiler flags |
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83 | const vector v2(vm,2,4); // proper code |
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84 | v2(0)=-123; // not acceptable for the compiler |
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85 | @endcode |
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86 | */ |
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87 | |
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88 | class VectorBase |
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89 | { |
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90 | public: |
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91 | /// \brief VectorBase::const_iterator |
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92 | typedef Iterator<const double&, const VectorBase> const_iterator; |
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93 | |
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94 | /** |
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95 | \brief Constructor. |
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96 | */ |
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97 | VectorBase(const gsl_vector* v=NULL); |
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98 | |
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99 | /// |
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100 | /// The destructor. |
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101 | /// |
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102 | virtual ~VectorBase(void); |
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103 | |
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104 | /** |
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105 | \return read-only iterator to start of VectorBase |
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106 | */ |
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107 | const_iterator begin(void) const; |
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108 | |
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109 | /** |
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110 | \return read-only iterator to end of VectorBase |
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111 | */ |
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112 | const_iterator end(void) const; |
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113 | |
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114 | /** |
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115 | \brief Check whether VectorBases are equal within a user defined |
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116 | precision, set by \a precision. |
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117 | |
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118 | \return True if each element deviates less or equal than \a |
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119 | d. If any VectorBase contain a NaN, false is always returned. |
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120 | |
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121 | \see operator== and operator!= |
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122 | */ |
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123 | bool equal(const VectorBase&, const double precision=0) const; |
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124 | |
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125 | /// |
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126 | /// @return A const pointer to the internal GSL vector, |
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127 | /// |
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128 | const gsl_vector* gsl_vector_p(void) const; |
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129 | |
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130 | /** |
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131 | Check if the vector object is a view (sub-vector) to another |
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132 | vector. |
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133 | |
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134 | \return True if the object is a view, false othwerwise. |
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135 | */ |
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136 | virtual bool isview(void) const=0; |
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137 | |
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138 | /// |
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139 | /// @return the number of elements in the VectorBase. |
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140 | /// |
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141 | size_t size(void) const; |
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142 | |
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143 | /** |
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144 | \brief Element access operator. |
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145 | |
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146 | \return Const reference to element \a i. |
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147 | |
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148 | \throw If GSL range checks are enabled in the underlying GSL |
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149 | library a GSL_error exception is thrown if either index is out |
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150 | of range. |
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151 | */ |
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152 | const double& operator()(size_t i) const; |
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153 | // Peter, remove this one |
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154 | const double& operator[](size_t i) const; |
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155 | |
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156 | /** |
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157 | \brief Comparison operator. Takes linear time. |
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158 | |
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159 | Checks are performed with exact matching, i.e., rounding off |
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160 | effects may destroy comparison. Use the equal function for |
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161 | comparing elements within a user defined precision. |
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162 | |
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163 | \return True if all elements are equal otherwise false. |
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164 | |
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165 | \see equal(const VectorBase&, const double precision=0) |
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166 | */ |
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167 | bool operator==(const VectorBase&) const; |
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168 | |
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169 | /** |
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170 | \brief Comparison operator. Takes linear time. |
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171 | |
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172 | Checks are performed with exact matching, i.e., rounding off |
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173 | effects may destroy comparison. Use the equal function for |
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174 | comparing elements within a user defined precision. |
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175 | |
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176 | \return False if all elements are equal otherwise true. |
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177 | |
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178 | \see equal(const VectorBase&, const double precision=0) |
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179 | */ |
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180 | bool operator!=(const VectorBase&) const; |
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181 | |
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182 | /// |
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183 | /// @return The dot product. |
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184 | /// |
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185 | double operator*(const VectorBase&) const; |
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186 | |
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187 | protected: |
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188 | const gsl_vector* const_vec_; |
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189 | |
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190 | private: |
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191 | // copy assignment no allowed |
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192 | const VectorBase& operator=(const VectorBase&); |
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193 | }; |
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194 | |
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195 | /** |
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196 | \brief Check if all elements of the VectorBase are zero. |
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197 | |
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198 | \return True if all elements in the VectorBase is zero, false |
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199 | othwerwise. |
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200 | */ |
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201 | bool isnull(const VectorBase&); |
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202 | |
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203 | /** |
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204 | \brief Get the maximum value of the VectorBase. |
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205 | |
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206 | \return The maximum value of the VectorBase. |
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207 | */ |
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208 | double max(const VectorBase&); |
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209 | |
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210 | /** |
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211 | \brief Locate the maximum value in the VectorBase. |
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212 | |
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213 | \return The index to the maximum value of the VectorBase. |
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214 | |
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215 | \note Lower index has precedence. |
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216 | */ |
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217 | size_t max_index(const VectorBase&); |
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218 | |
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219 | /** |
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220 | \brief Get the minimum value of the VectorBase. |
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221 | |
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222 | \return The minimum value of the VectorBase. |
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223 | */ |
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224 | double min(const VectorBase&); |
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225 | |
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226 | /** |
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227 | \brief Locate the minimum value in the VectorBase. |
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228 | |
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229 | \return The index to the minimum value of the VectorBase. |
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230 | |
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231 | \note Lower index has precedence. |
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232 | */ |
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233 | size_t min_index(const VectorBase&); |
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234 | |
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235 | /** |
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236 | \brief Create a VectorBase \a flag indicating NaN's in another VectorBase |
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237 | \a templat. |
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238 | |
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239 | The \a flag VectorBase is changed to contain 1's and 0's only. A 1 |
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240 | means that the corresponding element in the \a templat VectorBase is |
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241 | valid and a zero means that the corresponding element is a NaN. |
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242 | |
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243 | \note Space for VectorBase \a flag is reallocated to fit the size of |
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244 | VectorBase \a templat if sizes mismatch. |
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245 | |
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246 | \return True if the \a templat VectorBase contains at least one NaN. |
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247 | */ |
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248 | bool nan(const VectorBase& templat, vector& flag); |
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249 | |
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250 | /** |
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251 | Create a vector \a sort_index containing the indeces of |
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252 | elements in a another VectorBase \a invec. The elements of \a |
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253 | sort_index give the index of the VectorBase element which would |
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254 | have been stored in that position if the VectorBase had been sorted |
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255 | in place. The first element of \a sort_index gives the index of the least |
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256 | element in \a invec, and the last element of \a sort_index gives the |
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257 | index of the greatest element in \a invec . The VectorBase \a invec |
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258 | is not changed. |
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259 | */ |
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260 | void sort_index(std::vector<size_t>& sort_index, const VectorBase& invec); |
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261 | |
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262 | /** |
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263 | Similar to sort_index but creates a VectorBase with indices to the \a k |
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264 | smallest elements in \a invec. |
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265 | */ |
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266 | void sort_smallest_index(std::vector<size_t>& sort_index, size_t k, |
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267 | const VectorBase& invec); |
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268 | |
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269 | /** |
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270 | Similar to sort_index but creates a VectorBase with indices to the \a k |
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271 | largest elements in \a invec. |
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272 | */ |
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273 | void sort_largest_index(std::vector<size_t>& sort_index, size_t k, |
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274 | const VectorBase& invec); |
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275 | |
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276 | /** |
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277 | \brief Calculate the sum of all VectorBase elements. |
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278 | |
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279 | \return The sum. |
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280 | */ |
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281 | double sum(const VectorBase&); |
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282 | |
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283 | /** |
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284 | \brief The output operator for the VectorBase class. |
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285 | */ |
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286 | std::ostream& operator<<(std::ostream&, const VectorBase&); |
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287 | |
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288 | }}} // of namespace utility, yat, and theplu |
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289 | |
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290 | #endif |
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