1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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2 | /* $Id: ftmpl_matrix.cc,v 1.11 2006-05-15 09:03:07 Singular Exp $ */ |
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3 | |
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4 | #include <factoryconf.h> |
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5 | |
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6 | #ifdef macintosh |
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7 | #include <:templates:ftmpl_matrix.h> |
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8 | #else |
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9 | #include <templates/ftmpl_matrix.h> |
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10 | #endif |
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11 | |
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12 | template <class T> |
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13 | Matrix<T>::Matrix( int nr, int nc ) : NR(nr), NC(nc) |
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14 | { |
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15 | ASSERT( (nr > 0 && nc > 0) || (nr == 0 && nc == 0), "illegal index" ); |
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16 | if ( nr == 0 ) |
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17 | elems = 0; |
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18 | else { |
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19 | int i; |
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20 | elems = new T_ptr[nr]; |
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21 | for ( i = 0; i < nr; i++ ) |
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22 | elems[i] = new T[nc]; |
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23 | } |
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24 | } |
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25 | |
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26 | template <class T> |
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27 | Matrix<T>::Matrix( const Matrix<T>& M ) : NR(M.NR), NC(M.NC) |
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28 | { |
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29 | if ( NR == 0 ) |
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30 | elems = 0; |
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31 | else { |
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32 | int i, j; |
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33 | elems = new T_ptr[NR]; |
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34 | for ( i = 0; i < NR; i++ ) { |
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35 | elems[i] = new T[NC]; |
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36 | for ( j = 0; j < NC; j++ ) |
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37 | elems[i][j] = M.elems[i][j]; |
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38 | } |
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39 | } |
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40 | } |
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41 | |
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42 | template <class T> |
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43 | Matrix<T>::~Matrix() |
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44 | { |
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45 | if ( elems != 0 ) { |
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46 | int i; |
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47 | for ( i = 0; i < NR; i++ ) |
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48 | delete [] elems[i]; |
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49 | delete [] elems; |
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50 | } |
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51 | } |
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52 | |
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53 | template <class T> |
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54 | Matrix<T>& Matrix<T>::operator= ( const Matrix<T>& M ) |
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55 | { |
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56 | if ( this != &M ) { |
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57 | int i, j; |
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58 | if ( NR != M.NR || NC != M.NC ) { |
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59 | for ( i = 0; i < NR; i++ ) |
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60 | delete [] elems[i]; |
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61 | delete elems; |
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62 | NR = M.NR; NC = M.NC; |
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63 | elems = new T_ptr[NR]; |
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64 | for ( i = 0; i < NR; i++ ) |
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65 | elems[i] = new T[NC]; |
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66 | } |
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67 | for ( i = 0; i < NR; i++ ) |
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68 | for ( j = 0; j < NC; j++ ) |
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69 | elems[i][j] = M.elems[i][j]; |
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70 | } |
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71 | return *this; |
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72 | } |
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73 | |
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74 | template <class T> |
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75 | SubMatrix<T> Matrix<T>::operator[] ( int i ) |
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76 | { |
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77 | ASSERT( i > 0 && i <= NR, "illegal index" ); |
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78 | return SubMatrix<T>( i, i, 1, NC, *this ); |
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79 | } |
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80 | |
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81 | template <class T> |
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82 | const SubMatrix<T> Matrix<T>::operator[] ( int i ) const |
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83 | { |
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84 | ASSERT( i > 0 && i <= NR, "illegal index" ); |
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85 | return SubMatrix<T>( i, i, 1, NC, *this ); |
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86 | } |
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87 | |
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88 | template <class T> |
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89 | T& Matrix<T>::operator() ( int row, int col ) |
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90 | { |
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91 | ASSERT( row > 0 && col > 0 && row <= NR && col <= NC, "illegal index" ); |
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92 | return elems[row-1][col-1]; |
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93 | } |
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94 | |
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95 | template <class T> |
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96 | T Matrix<T>::operator() ( int row, int col ) const |
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97 | { |
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98 | ASSERT( row > 0 && col > 0 && row <= NR && col <= NC, "illegal index" ); |
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99 | return elems[row-1][col-1]; |
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100 | } |
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101 | |
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102 | template <class T> |
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103 | SubMatrix<T> Matrix<T>::operator() ( int rmin, int rmax, int cmin, int cmax ) |
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104 | { |
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105 | ASSERT( rmin > 0 && rmax <= NR && rmin <= rmax && cmin > 0 && cmax <= NC && cmin <= cmax , "illegal index" ); |
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106 | return SubMatrix<T>( rmin, rmax, cmin, cmax, *this ); |
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107 | } |
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108 | |
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109 | template <class T> |
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110 | const SubMatrix<T> Matrix<T>::operator() ( int rmin, int rmax, int cmin, int cmax ) const |
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111 | { |
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112 | ASSERT( rmin > 0 && rmax <= NR && rmin <= rmax && cmin > 0 && cmax <= NC && cmin <= cmax , "illegal index" ); |
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113 | return SubMatrix<T>( rmin, rmax, cmin, cmax, *this ); |
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114 | } |
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115 | |
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116 | template <class T> |
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117 | void Matrix<T>::swapRow ( int i, int j ) |
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118 | { |
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119 | ASSERT( i > 0 && i <= NR && j > 0 && j <= NR, "illegal index" ); |
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120 | if ( i != j ) { |
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121 | i--; j--; |
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122 | T * h = elems[i]; |
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123 | elems[i] = elems[j]; |
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124 | elems[j] = h; |
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125 | } |
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126 | } |
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127 | |
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128 | template <class T> |
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129 | void Matrix<T>::swapColumn ( int i, int j ) |
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130 | { |
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131 | ASSERT( i > 0 && i <= NC && j > 0 && j <= NC, "illegal index" ); |
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132 | if ( i != j ) { |
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133 | int k; |
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134 | i--; j--; |
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135 | for ( k = 0; k < NR; k++ ) { |
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136 | T h = elems[k][i]; |
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137 | elems[k][i] = elems[k][j]; |
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138 | elems[k][j] = h; |
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139 | } |
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140 | } |
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141 | } |
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142 | |
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143 | #ifndef NOSTREAMIO |
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144 | template <class T> |
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145 | void Matrix<T>::printrow ( OSTREAM & s, int i ) const |
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146 | { |
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147 | s << "( " << elems[i][0]; |
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148 | for ( int j = 1; j < NC; j++ ) |
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149 | s << ", " << elems[i][j]; |
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150 | s << " )"; |
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151 | } |
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152 | |
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153 | template <class T> |
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154 | void Matrix<T>::print( OSTREAM& s ) const |
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155 | { |
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156 | if ( NR == 0 ) |
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157 | s << "( )"; |
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158 | else if ( NR == 1 ) { |
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159 | s << "( "; |
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160 | printrow( s, 0 ); |
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161 | s << " )"; |
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162 | } |
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163 | else { |
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164 | int i; |
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165 | s << "(\n"; |
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166 | printrow( s, 0 ); |
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167 | for ( i = 1; i < NR; i++ ) { |
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168 | s << ",\n"; |
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169 | printrow( s, i ); |
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170 | } |
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171 | s << "\n)"; |
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172 | } |
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173 | } |
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174 | #endif /* NOSTREAMIO */ |
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175 | |
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176 | template <class T> |
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177 | Matrix<T> operator+ ( const Matrix<T>& lhs, const Matrix<T>& rhs ) |
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178 | { |
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179 | ASSERT( lhs.NR == rhs.NR && lhs.NC == rhs.NC, "incompatible matrices" ); |
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180 | Matrix<T> res( lhs.NR, rhs.NR ); |
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181 | int i, j; |
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182 | for ( i = 0; i < lhs.NR; i++ ) |
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183 | for ( j = 0; j < lhs.NC; j++ ) |
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184 | res.elems[i][j] = lhs.elems[i][j] + rhs.elems[i][j]; |
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185 | return res; |
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186 | } |
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187 | |
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188 | template <class T> |
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189 | Matrix<T> operator- ( const Matrix<T>& lhs, const Matrix<T>& rhs ) |
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190 | { |
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191 | ASSERT( lhs.NR == rhs.NR && lhs.NC == rhs.NC, "incompatible matrices" ); |
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192 | Matrix<T> res( lhs.NR, rhs.NR ); |
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193 | int i, j; |
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194 | for ( i = 0; i < lhs.NR; i++ ) |
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195 | for ( j = 0; j < lhs.NC; j++ ) |
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196 | res.elems[i][j] = lhs.elems[i][j] - rhs.elems[i][j]; |
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197 | return res; |
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198 | } |
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199 | |
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200 | template <class T> |
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201 | Matrix<T> operator* ( const Matrix<T>& lhs, const T& rhs ) |
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202 | { |
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203 | Matrix<T> res( lhs.NR, lhs.NC ); |
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204 | int i, j; |
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205 | for ( i = 0; i < lhs.NR; i++ ) |
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206 | for ( j = 0; j < lhs.NC; j++ ) |
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207 | res.elems[i][j] = lhs.elems[i][j] * rhs; |
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208 | return res; |
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209 | } |
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210 | |
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211 | template <class T> |
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212 | Matrix<T> operator* ( const T& lhs, const Matrix<T>& rhs ) |
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213 | { |
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214 | Matrix<T> res( rhs.NR, rhs.NC ); |
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215 | int i, j; |
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216 | for ( i = 0; i < rhs.NR; i++ ) |
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217 | for ( j = 0; j < rhs.NC; j++ ) |
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218 | res.elems[i][j] = rhs.elems[i][j] * lhs; |
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219 | return res; |
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220 | } |
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221 | |
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222 | template <class T> |
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223 | Matrix<T> operator* ( const Matrix<T>& lhs, const Matrix<T>& rhs ) |
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224 | { |
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225 | ASSERT( lhs.NC == rhs.NR, "incompatible matrices" ); |
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226 | Matrix<T> res( lhs.NR, rhs.NC ); |
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227 | int i, j, k; |
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228 | for ( i = 0; i < lhs.NR; i++ ) |
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229 | for ( j = 0; j < rhs.NC; j++ ) { |
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230 | res[i][j] = 0; |
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231 | for ( k = 0; k < lhs.NC; k++ ) |
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232 | res[i][j]+= lhs.elems[i][k] * rhs.elems[k][j]; |
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233 | } |
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234 | return res; |
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235 | } |
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236 | |
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237 | template <class T> |
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238 | SubMatrix<T>::SubMatrix( int rmin, int rmax, int cmin, int cmax, const Matrix<T> & m ) : r_min(rmin), r_max(rmax), c_min(cmin), c_max(cmax), M((Matrix<T>&)m) {} |
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239 | |
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240 | template <class T> |
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241 | SubMatrix<T>::SubMatrix( const SubMatrix<T> & S ) : r_min(S.r_min), r_max(S.r_max), c_min(S.c_min), c_max(S.c_max), M(S.M) {} |
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242 | |
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243 | template <class T> |
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244 | SubMatrix<T>& SubMatrix<T>::operator= ( const Matrix<T>& S ) |
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245 | { |
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246 | ASSERT( r_max - r_min + 1 == S.NR && c_max - c_min + 1 == S.NC, "incompatible matrices" ); |
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247 | if ( M.elems != S.elems ) { |
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248 | int i, j; |
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249 | for ( i = 0; i < S.NR; i++ ) |
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250 | for ( j = 0; j < S.NC; j++ ) |
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251 | M.elems[r_min+i-1][c_min+j-1] = S.elems[i][j]; |
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252 | } |
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253 | return *this; |
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254 | } |
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255 | |
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256 | template <class T> |
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257 | SubMatrix<T>& SubMatrix<T>::operator= ( const SubMatrix<T>& S ) |
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258 | { |
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259 | ASSERT( r_max - r_min == S.r_max - S.r_min && c_max - c_min == S.c_max - S.c_min, "incompatible matrices" ); |
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260 | int i, j, n, m; |
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261 | n = r_max - r_min + 1; |
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262 | m = c_max - c_min + 1; |
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263 | if ( M.elems == S.M.elems ) { |
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264 | if ( r_min < S.r_min ) { |
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265 | for ( i = 0; i < n; i++ ) |
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266 | for ( j = 0; j < m; j++ ) |
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267 | M.elems[r_min+i-1][c_min+j-1] = S.M.elems[S.r_min+i-1][S.c_min+j-1]; |
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268 | } |
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269 | else if ( r_min > S.r_min ) { |
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270 | for ( i = n-1; i >= 0; i-- ) |
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271 | for ( j = 0; j < m; j++ ) |
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272 | M.elems[r_min+i-1][c_min+j-1] = S.M.elems[S.r_min+i-1][S.c_min+j-1]; |
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273 | } |
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274 | else if ( c_min < S.c_min ) { |
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275 | for ( j = 0; j < m; j++ ) |
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276 | for ( i = 0; i < n; i++ ) |
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277 | M.elems[r_min+i-1][c_min+j-1] = S.M.elems[S.r_min+i-1][S.c_min+j-1]; |
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278 | } |
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279 | else if ( c_min > S.c_min ) { |
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280 | for ( j = m-1; j >= 0; j-- ) |
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281 | for ( i = 0; i < n; i++ ) |
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282 | M.elems[r_min+i-1][c_min+j-1] = S.M.elems[S.r_min+i-1][S.c_min+j-1]; |
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283 | } |
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284 | } |
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285 | else { |
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286 | for ( i = 0; i < n; i++ ) |
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287 | for ( j = 0; j < m; j++ ) |
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288 | M.elems[r_min+i-1][c_min+j-1] = S.M.elems[S.r_min+i-1][S.c_min+j-1]; |
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289 | } |
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290 | return *this; |
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291 | } |
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292 | |
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293 | template <class T> |
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294 | SubMatrix<T>::operator Matrix<T>() const |
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295 | { |
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296 | Matrix<T> res( r_max - r_min + 1, c_max - c_min + 1 ); |
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297 | int i, j; |
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298 | int n = r_max - r_min + 1, m = c_max - c_min + 1; |
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299 | for ( i = 0; i < n; i++ ) |
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300 | for ( j = 0; j < m; j++ ) |
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301 | res.elems[i][j] = M.elems[r_min+i-1][c_min+j-1]; |
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302 | return res; |
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303 | } |
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304 | |
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305 | template <class T> |
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306 | T SubMatrix<T>::operator[] ( int i ) const |
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307 | { |
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308 | ASSERT( r_min == r_max && i >= c_min && i <= c_max, "illegal index" ); |
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309 | return M.elems[r_min-1][i-1]; |
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310 | } |
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311 | |
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312 | template <class T> |
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313 | T& SubMatrix<T>::operator[] ( int i ) |
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314 | { |
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315 | ASSERT( r_min == r_max && i >= c_min && i <= c_max, "illegal index" ); |
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316 | return M.elems[r_min-1][i-1]; |
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317 | } |
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318 | |
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319 | #ifndef NOSTREAMIO |
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320 | template <class T> |
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321 | OSTREAM & operator<< ( OSTREAM & s, const Matrix<T>& M ) |
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322 | { |
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323 | M.print( s ); |
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324 | return s; |
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325 | } |
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326 | #endif /* NOSTREAMIO */ |
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