1 | // $Id: matrix.h 226 2005-02-01 00:49:38Z jari $ |
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2 | |
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3 | #ifndef _theplu_gslapi_matrix_ |
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4 | #define _theplu_gslapi_matrix_ |
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5 | |
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6 | #include <iostream> |
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7 | |
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8 | #include <gsl/gsl_matrix.h> |
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9 | #include "vector.h" |
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10 | |
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11 | namespace theplu { |
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12 | namespace gslapi { |
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13 | |
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14 | class vector; |
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15 | |
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16 | /// |
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17 | /// This is the C++ tools interface to GSL matrix. 'double' is the |
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18 | /// only type supported, maybe we should add a 'complex' type as |
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19 | /// well in the future. |
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20 | /// |
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21 | class matrix |
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22 | { |
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23 | public: |
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24 | |
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25 | /// |
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26 | /// The default constructor. |
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27 | /// |
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28 | matrix(void); |
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29 | |
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30 | /// |
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31 | /// Constructor. Allocates memory space for \a r times \a c |
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32 | /// elements, and sets all elements to \a init_value. |
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33 | /// |
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34 | matrix(const size_t& r, const size_t& c, const double init_value=0); |
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35 | |
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36 | /// |
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37 | /// The copy constructor. |
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38 | /// |
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39 | matrix(const matrix&); |
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40 | |
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41 | /// |
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42 | /// The istream constructor. |
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43 | /// |
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44 | /// Matrix rows are sepearated with the new line character, and |
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45 | /// column elements in a row must be separated with white space |
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46 | /// characters except the new line (\\n) character. Rows, and |
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47 | /// columns, are read consequently and only rectangular matrices |
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48 | /// are supported. Empty lines are ignored. End of input is at end |
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49 | /// of file marker. |
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50 | /// |
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51 | explicit matrix(std::istream &); |
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52 | |
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53 | /// |
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54 | /// The destructor. |
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55 | /// |
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56 | ~matrix(void); |
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57 | |
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58 | /// |
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59 | /// @return The number of columns in the matrix. |
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60 | /// |
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61 | inline size_t columns(void) const { return m_->size2; } |
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62 | |
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63 | /// |
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64 | /// Swap column \a i with \j. |
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65 | /// |
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66 | inline void column_swap(const size_t& i,const size_t& j) |
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67 | { gsl_matrix_swap_columns(m_,i,j); } |
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68 | |
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69 | /// |
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70 | /// Create a new copy of the internal GSL matrix. |
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71 | /// |
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72 | /// Necessary memory for the new GSL matrix is allocated and the |
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73 | /// caller is responsible for freeing the allocated memory. |
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74 | /// |
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75 | /// @return A pointer to a copy of the internal GSL matrix. |
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76 | /// |
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77 | gsl_matrix* gsl_matrix_copy(void) const; |
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78 | |
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79 | /// |
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80 | /// @return A const pointer to the internal GSL matrix. |
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81 | /// |
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82 | inline const gsl_matrix* gsl_matrix_pointer(void) const { return m_; } |
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83 | |
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84 | /// |
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85 | /// @return A pointer to the internal GSL matrix. |
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86 | /// |
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87 | inline gsl_matrix* gsl_matrix_pointer(void) { return m_; }; |
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88 | |
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89 | /// |
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90 | /// This function multiplies all elements between two matrices and |
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91 | /// returns a third matrix containing the result, \f$a_{ij} = |
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92 | /// b_{ij} * c_{ij} \; \forall i,j\f$. |
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93 | /// |
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94 | /// @return The result matrix. |
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95 | /// |
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96 | matrix mul_elements(const matrix&); |
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97 | |
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98 | /// |
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99 | /// Swap row \a i with \a j. |
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100 | /// |
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101 | inline void row_swap( const size_t& i, const size_t& j) |
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102 | { gsl_matrix_swap_rows(m_,i,j); } |
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103 | |
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104 | /// |
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105 | /// @return The number of rows in the matrix. |
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106 | /// |
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107 | inline size_t rows(void) const { return m_->size1; } |
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108 | |
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109 | /// |
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110 | /// Set all elements to \a value. |
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111 | /// |
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112 | inline void set_all(const double value) { gsl_matrix_set_all(m_,value); } |
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113 | |
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114 | /// |
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115 | /// Set column \a i to \a vec. |
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116 | /// |
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117 | inline void set_column(const size_t i, const vector vec) |
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118 | {gsl_matrix_set_col(m_, i, vec.gsl_vector_pointer());} |
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119 | |
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120 | /// |
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121 | /// Set row \a i to \a vec. |
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122 | /// |
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123 | inline void set_row(const size_t i, const vector vec) |
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124 | {gsl_matrix_set_row(m_, i, vec.gsl_vector_pointer());} |
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125 | |
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126 | /// |
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127 | /// Set column \a i to \a vec |
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128 | /// |
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129 | //void matrix set_column(const size_t i, const vector vec) const; |
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130 | |
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131 | /// |
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132 | /// Transpose the matrix. |
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133 | /// |
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134 | /// @return Transpose of the matrix. |
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135 | /// |
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136 | matrix transpose(void) const; |
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137 | |
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138 | /// |
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139 | /// @return Reference to the element position (\a row, \a column). |
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140 | /// |
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141 | inline double& operator()(size_t row,size_t column) |
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142 | { return (*gsl_matrix_ptr(m_,row,column)); } |
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143 | |
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144 | /// |
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145 | /// @return Const reference to the element position (\a row, \a |
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146 | /// column). |
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147 | /// |
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148 | inline const double& operator()(size_t row,size_t column) const |
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149 | { return (*gsl_matrix_const_ptr(m_,row,column)); } |
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150 | |
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151 | /// |
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152 | /// Jari, To be implemented. Should return a reference to a vector |
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153 | /// object. Underlying GSL supports only GSL_vector views, thus |
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154 | /// some redesign of the vector class is needed. |
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155 | /// |
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156 | /// inline vector& operator[](size_t i); |
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157 | /// So for now, stupid copying is done, and actually a matrix |
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158 | /// row is returned using this function. |
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159 | vector operator[](size_t row) const; |
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160 | |
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161 | /// |
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162 | /// Jari, to be properly implemented. Should return a reference to |
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163 | /// a vector object (matrix row). Underlying GSL supports only GSL_vector |
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164 | /// views, thus some redesign of the vector class is needed. |
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165 | /// |
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166 | /// inline const vector& operator[](size_t i) const; |
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167 | /// |
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168 | /// So for now, stupid copying is done, and actually a matrix |
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169 | /// column is returned using this function. |
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170 | vector TEMP_col_return(size_t column) const; |
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171 | |
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172 | /// |
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173 | /// Matrix multiplication. |
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174 | /// |
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175 | /// @return The resulting matrix. |
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176 | /// |
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177 | matrix operator*(const matrix&) const; |
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178 | |
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179 | /// |
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180 | /// Matrix-vector multiplication. |
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181 | /// |
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182 | /// @return The resulting vector. |
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183 | /// |
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184 | vector operator*(const vector&) const; |
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185 | |
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186 | /// |
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187 | /// Matrix addition. |
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188 | /// |
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189 | /// @return The resulting matrix. |
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190 | /// |
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191 | matrix operator+(const matrix&) const; |
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192 | |
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193 | /// |
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194 | /// Matrix subtraction. |
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195 | /// |
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196 | /// @return The resulting matrix. |
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197 | /// |
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198 | matrix operator-(const matrix&) const; |
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199 | |
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200 | /// |
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201 | /// Comparison operator. |
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202 | /// |
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203 | /// @return True if ... (to be defined) ... otherwise false. |
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204 | /// |
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205 | bool operator==( const matrix &other ) const; |
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206 | |
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207 | /// |
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208 | /// Comparison operator. |
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209 | /// |
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210 | /// @return True if ... (to be defined) ... otherwise false. |
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211 | /// |
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212 | bool operator!=( const matrix &other ) const; |
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213 | |
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214 | /// |
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215 | /// The assignment operator. There is no requirements on |
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216 | /// dimensions. |
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217 | /// |
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218 | matrix& operator=(const matrix& other); |
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219 | |
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220 | /// |
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221 | /// Subtract and assign operator. |
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222 | /// |
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223 | inline matrix& operator-=(const matrix& m) |
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224 | { gsl_matrix_sub(m_,m.m_); return *this; } |
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225 | |
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226 | /// |
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227 | /// Multiply and assign operator. |
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228 | /// |
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229 | inline matrix& operator*=(const double d) |
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230 | { gsl_matrix_scale(m_,d); return *this; } |
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231 | |
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232 | |
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233 | private: |
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234 | |
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235 | gsl_matrix* m_; |
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236 | |
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237 | }; |
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238 | |
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239 | /// |
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240 | /// The output operator for the vector class. |
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241 | /// |
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242 | std::ostream& operator<< (std::ostream& s, const matrix&); |
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243 | |
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244 | |
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245 | |
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246 | }} // of namespace gslapi and namespace theplu |
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247 | |
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248 | #endif |
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