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1 /* |
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2 |
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3 Copyright (C) 2004, 2005, 2006, 2007 David Bateman |
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4 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Andy Adler |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cstdlib> |
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29 #include <string> |
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30 |
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31 #include "variables.h" |
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32 #include "utils.h" |
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33 #include "pager.h" |
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34 #include "defun-dld.h" |
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35 #include "gripes.h" |
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36 #include "quit.h" |
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37 |
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38 #include "ov-re-sparse.h" |
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39 #include "ov-cx-sparse.h" |
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40 #include "ov-bool-sparse.h" |
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41 |
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42 static bool |
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43 is_sparse (const octave_value& arg) |
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44 { |
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45 return (arg.is_sparse_type ()); |
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46 } |
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47 |
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48 DEFUN_DLD (issparse, args, , |
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49 "-*- texinfo -*-\n\ |
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50 @deftypefn {Loadable Function} {} issparse (@var{expr})\n\ |
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51 Return 1 if the value of the expression @var{expr} is a sparse matrix.\n\ |
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52 @end deftypefn") |
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53 { |
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54 if (args.length() != 1) |
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55 { |
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56 print_usage (); |
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57 return octave_value (); |
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58 } |
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59 else |
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60 return octave_value (is_sparse (args(0))); |
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61 } |
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62 |
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63 DEFUN_DLD (sparse, args, , |
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64 "-*- texinfo -*-\n\ |
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65 @deftypefn {Loadable Function} {@var{s} =} sparse (@var{a})\n\ |
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66 Create a sparse matrix from the full matrix @var{a}.\n\ |
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67 is forced back to a full matrix is resulting matrix is sparse\n\ |
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68 \n\ |
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69 @deftypefnx {Loadable Function} {@var{s} =} sparse (@var{i}, @var{j}, @var{sv}, @var{m}, @var{n}, @var{nzmax})\n\ |
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70 Create a sparse matrix given integer index vectors @var{i} and @var{j},\n\ |
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71 a 1-by-@code{nnz} vector of real of complex values @var{sv}, overall\n\ |
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72 dimensions @var{m} and @var{n} of the sparse matrix. The argument\n\ |
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73 @code{nzmax} is ignored but accepted for compatibility with @sc{Matlab}.\n\ |
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74 \n\ |
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75 @strong{Note}: if multiple values are specified with the same\n\ |
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76 @var{i}, @var{j} indices, the corresponding values in @var{s} will\n\ |
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77 be added.\n\ |
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78 \n\ |
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79 The following are all equivalent:\n\ |
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80 \n\ |
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81 @example\n\ |
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82 @group\n\ |
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83 s = sparse (i, j, s, m, n)\n\ |
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84 s = sparse (i, j, s, m, n, \"summation\")\n\ |
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85 s = sparse (i, j, s, m, n, \"sum\")\n\ |
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86 @end group\n\ |
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87 @end example\n\ |
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88 \n\ |
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89 @deftypefnx {Loadable Function} {@var{s} =} sparse (@var{i}, @var{j}, @var{s}, @var{m}, @var{n}, \"unique\")\n\ |
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90 Same as above, except that if more than two values are specified for the\n\ |
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91 same @var{i}, @var{j} indices, the last specified value will be used.\n\ |
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92 \n\ |
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93 @deftypefnx {Loadable Function} {@var{s} =} sparse (@var{i}, @var{j}, @var{sv})\n\ |
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94 Uses @code{@var{m} = max (@var{i})}, @code{@var{n} = max (@var{j})}\n\ |
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95 \n\ |
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96 @deftypefnx {Loadable Function} {@var{s} =} sparse (@var{m}, @var{n})\n\ |
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97 Equivalent to @code{sparse ([], [], [], @var{m}, @var{n}, 0)}\n\ |
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98 \n\ |
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99 If any of @var{sv}, @var{i} or @var{j} are scalars, they are expanded\n\ |
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100 to have a common size.\n\ |
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101 @seealso{full}\n\ |
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102 @end deftypefn") |
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103 { |
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104 octave_value retval; |
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105 |
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106 // WARNING: This function should always use constructions like |
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107 // retval = new octave_sparse_matrix (sm); |
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108 // To avoid calling the maybe_mutate function. This is the only |
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109 // function that should not call maybe_mutate |
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110 |
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111 int nargin= args.length(); |
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112 if (nargin < 1 || (nargin == 4 && !args(3).is_string ()) || nargin > 6) |
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113 { |
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114 print_usage (); |
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115 return retval; |
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116 } |
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117 |
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118 bool use_complex = false; |
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119 bool use_bool = false; |
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120 if (nargin > 2) |
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121 { |
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122 use_complex= args(2).is_complex_type(); |
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123 use_bool = args(2).is_bool_type (); |
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124 } |
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125 else |
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126 { |
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127 use_complex= args(0).is_complex_type(); |
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128 use_bool = args(0).is_bool_type (); |
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129 } |
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130 |
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131 if (nargin == 1) |
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132 { |
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133 octave_value arg = args (0); |
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134 |
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135 if (is_sparse (arg)) |
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136 { |
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137 if (use_complex) |
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138 { |
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139 SparseComplexMatrix sm = arg.sparse_complex_matrix_value (); |
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140 retval = new octave_sparse_complex_matrix (sm); |
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141 } |
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142 else if (use_bool) |
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143 { |
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144 SparseBoolMatrix sm = arg.sparse_bool_matrix_value (); |
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145 retval = new octave_sparse_bool_matrix (sm); |
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146 } |
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147 else |
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148 { |
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149 SparseMatrix sm = arg.sparse_matrix_value (); |
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150 retval = new octave_sparse_matrix (sm); |
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151 } |
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152 } |
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153 else |
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154 { |
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155 if (use_complex) |
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156 { |
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157 SparseComplexMatrix sm (args (0).complex_matrix_value ()); |
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158 if (error_state) |
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159 return retval; |
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160 retval = new octave_sparse_complex_matrix (sm); |
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161 } |
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162 else if (use_bool) |
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163 { |
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164 SparseBoolMatrix sm (args (0).bool_matrix_value ()); |
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165 if (error_state) |
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166 return retval; |
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167 retval = new octave_sparse_bool_matrix (sm); |
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168 } |
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169 else |
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170 { |
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171 SparseMatrix sm (args (0).matrix_value ()); |
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172 if (error_state) |
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173 return retval; |
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174 retval = new octave_sparse_matrix (sm); |
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175 } |
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176 } |
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177 } |
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178 else |
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179 { |
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180 octave_idx_type m = 1, n = 1; |
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181 if (nargin == 2) |
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182 { |
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183 if (args(0).numel () == 1 && args(1).numel () == 1) |
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184 { |
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185 m = args(0).int_value(); |
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186 n = args(1).int_value(); |
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187 if (error_state) return retval; |
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188 |
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189 if (use_complex) |
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190 retval = new octave_sparse_complex_matrix |
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191 (SparseComplexMatrix (m, n)); |
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192 else if (use_bool) |
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193 retval = new octave_sparse_bool_matrix |
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194 (SparseBoolMatrix (m, n)); |
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195 else |
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196 retval = new octave_sparse_matrix |
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197 (SparseMatrix (m, n)); |
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198 } |
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199 else |
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200 error ("sparse: expecting scalar values"); |
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201 } |
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202 else |
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203 { |
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204 if (args(0).is_empty () || args (1).is_empty () |
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205 || args(2).is_empty ()) |
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206 { |
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207 if (nargin > 4) |
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208 { |
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209 m = args(3).int_value(); |
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210 n = args(4).int_value(); |
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211 } |
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212 |
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213 if (use_bool) |
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214 retval = new octave_sparse_bool_matrix |
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215 (SparseBoolMatrix (m, n)); |
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216 else |
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217 retval = new octave_sparse_matrix (SparseMatrix (m, n)); |
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218 } |
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219 else |
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220 { |
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221 // |
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222 // I use this clumsy construction so that we can use |
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223 // any orientation of args |
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224 ColumnVector ridxA = ColumnVector (args(0).vector_value |
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225 (false, true)); |
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226 ColumnVector cidxA = ColumnVector (args(1).vector_value |
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227 (false, true)); |
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228 ColumnVector coefA; |
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229 boolNDArray coefAB; |
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230 ComplexColumnVector coefAC; |
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231 bool assemble_do_sum = true; // this is the default in matlab6 |
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232 |
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233 if (use_complex) |
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234 { |
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235 if (args(2).is_empty ()) |
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236 coefAC = ComplexColumnVector (0); |
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237 else |
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238 coefAC = ComplexColumnVector |
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239 (args(2).complex_vector_value (false, true)); |
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240 } |
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241 else if (use_bool) |
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242 { |
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243 if (args(2).is_empty ()) |
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244 coefAB = boolNDArray (dim_vector (1, 0)); |
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245 else |
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246 coefAB = args(2).bool_array_value (); |
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247 dim_vector AB_dims = coefAB.dims (); |
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248 if (AB_dims.length() > 2 || (AB_dims(0) != 1 && |
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249 AB_dims(1) != 1)) |
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250 error ("sparse: vector arguments required"); |
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251 } |
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252 else |
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253 if (args(2).is_empty ()) |
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254 coefA = ColumnVector (0); |
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255 else |
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256 coefA = ColumnVector (args(2).vector_value (false, true)); |
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257 |
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258 if (error_state) |
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259 return retval; |
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260 |
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261 // Confirm that i,j,s all have the same number of elements |
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262 octave_idx_type ns; |
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263 if (use_complex) |
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264 ns = coefAC.length(); |
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265 else if (use_bool) |
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266 ns = coefAB.length(); |
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267 else |
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268 ns = coefA.length(); |
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269 |
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270 octave_idx_type ni = ridxA.length(); |
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271 octave_idx_type nj = cidxA.length(); |
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272 octave_idx_type nnz = (ni > nj ? ni : nj); |
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273 if ((ns != 1 && ns != nnz) || |
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274 (ni != 1 && ni != nnz) || |
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275 (nj != 1 && nj != nnz)) |
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276 { |
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277 error ("sparse i, j and s must have the same length"); |
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278 return retval; |
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279 } |
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280 |
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281 if (nargin == 3 || nargin == 4) |
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282 { |
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283 m = static_cast<octave_idx_type> (ridxA.max()); |
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284 n = static_cast<octave_idx_type> (cidxA.max()); |
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285 |
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286 // if args(3) is not string, then ignore the value |
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287 // otherwise check for summation or unique |
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288 if (nargin == 4 && args(3).is_string()) |
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289 { |
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290 std::string vv= args(3).string_value(); |
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291 if (error_state) return retval; |
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292 |
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293 if ( vv == "summation" || |
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294 vv == "sum" ) |
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295 assemble_do_sum = true; |
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296 else |
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297 if ( vv == "unique" ) |
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298 assemble_do_sum = false; |
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299 else { |
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300 error("sparse repeat flag must be 'sum' or 'unique'"); |
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301 return retval; |
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302 } |
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303 } |
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304 } |
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305 else |
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306 { |
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307 m = args(3).int_value(); |
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308 n = args(4).int_value(); |
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309 if (error_state) |
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310 return retval; |
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311 |
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312 // if args(5) is not string, then ignore the value |
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313 // otherwise check for summation or unique |
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314 if (nargin >= 6 && args(5).is_string()) |
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315 { |
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316 std::string vv= args(5).string_value(); |
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317 if (error_state) return retval; |
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318 |
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319 if ( vv == "summation" || |
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320 vv == "sum" ) |
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321 assemble_do_sum = true; |
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322 else |
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323 if ( vv == "unique" ) |
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324 assemble_do_sum = false; |
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325 else { |
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326 error("sparse repeat flag must be 'sum' or 'unique'"); |
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327 return retval; |
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328 } |
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329 } |
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330 |
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331 } |
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332 |
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333 // Convert indexing to zero-indexing used internally |
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334 ridxA -= 1.; |
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335 cidxA -= 1.; |
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336 |
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337 if (use_complex) |
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338 retval = new octave_sparse_complex_matrix |
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339 (SparseComplexMatrix (coefAC, ridxA, cidxA, m, n, |
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340 assemble_do_sum)); |
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341 else if (use_bool) |
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342 retval = new octave_sparse_bool_matrix |
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343 (SparseBoolMatrix (coefAB, ridxA, cidxA, m, n, |
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344 assemble_do_sum)); |
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345 else |
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346 retval = new octave_sparse_matrix |
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347 (SparseMatrix (coefA, ridxA, cidxA, m, n, |
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348 assemble_do_sum)); |
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349 } |
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350 } |
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351 } |
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352 |
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353 return retval; |
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354 } |
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355 |
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356 DEFUN_DLD (full, args, , |
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357 "-*- texinfo -*-\n\ |
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358 @deftypefn {Loadable Function} {@var{FM} =} full (@var{SM})\n\ |
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359 returns a full storage matrix from a sparse one\n\ |
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360 @seealso{sparse}\n\ |
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361 @end deftypefn") |
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362 { |
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363 octave_value retval; |
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364 |
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365 if (args.length() < 1) |
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366 { |
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367 print_usage (); |
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368 return retval; |
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369 } |
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370 |
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371 if (args(0).is_sparse_type ()) |
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372 { |
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373 if (args(0).type_name () == "sparse matrix") |
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374 retval = args(0).matrix_value (); |
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375 else if (args(0).type_name () == "sparse complex matrix") |
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376 retval = args(0).complex_matrix_value (); |
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377 else if (args(0).type_name () == "sparse bool matrix") |
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378 retval = args(0).bool_matrix_value (); |
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379 } |
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380 else if (args(0).is_real_type()) |
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381 retval = args(0).matrix_value(); |
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382 else if (args(0).is_complex_type()) |
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383 retval = args(0).complex_matrix_value(); |
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384 else |
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385 gripe_wrong_type_arg ("full", args(0)); |
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386 |
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387 return retval; |
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388 } |
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389 |
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390 #define SPARSE_DIM_ARG_BODY(NAME, FUNC) \ |
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391 int nargin = args.length(); \ |
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392 octave_value retval; \ |
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393 if ((nargin != 1 ) && (nargin != 2)) \ |
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394 print_usage (); \ |
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395 else { \ |
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396 int dim = (nargin == 1 ? -1 : args(1).int_value(true) - 1); \ |
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397 if (error_state) return retval; \ |
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398 if (dim < -1 || dim > 1) { \ |
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399 error (#NAME ": invalid dimension argument = %d", dim + 1); \ |
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400 return retval; \ |
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401 } \ |
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402 if (args(0).type_id () == \ |
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403 octave_sparse_matrix::static_type_id () || args(0).type_id () == \ |
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404 octave_sparse_bool_matrix::static_type_id ()) { \ |
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405 retval = args(0).sparse_matrix_value () .FUNC (dim); \ |
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406 } else if (args(0).type_id () == \ |
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407 octave_sparse_complex_matrix::static_type_id ()) { \ |
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408 retval = args(0).sparse_complex_matrix_value () .FUNC (dim); \ |
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409 } else \ |
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410 print_usage (); \ |
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411 } \ |
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412 return retval |
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413 |
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414 // PKG_ADD: dispatch ("prod", "spprod", "sparse matrix"); |
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415 // PKG_ADD: dispatch ("prod", "spprod", "sparse complex matrix"); |
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416 // PKG_ADD: dispatch ("prod", "spprod", "sparse bool matrix"); |
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417 DEFUN_DLD (spprod, args, , |
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418 "-*- texinfo -*-\n\ |
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419 @deftypefn {Loadable Function} {@var{y} =} spprod (@var{x},@var{dim})\n\ |
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420 Product of elements along dimension @var{dim}. If @var{dim} is omitted,\n\ |
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421 it defaults to 1 (column-wise products).\n\ |
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422 @seealso{spsum, spsumsq}\n\ |
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423 @end deftypefn") |
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424 { |
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425 SPARSE_DIM_ARG_BODY (spprod, prod); |
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426 } |
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427 |
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428 // PKG_ADD: dispatch ("cumprod", "spcumprod", "sparse matrix"); |
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429 // PKG_ADD: dispatch ("cumprod", "spcumprod", "sparse complex matrix"); |
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430 // PKG_ADD: dispatch ("cumprod", "spcumprod", "sparse bool matrix"); |
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431 DEFUN_DLD (spcumprod, args, , |
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432 "-*- texinfo -*-\n\ |
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433 @deftypefn {Loadable Function} {@var{y} =} spcumprod (@var{x},@var{dim})\n\ |
|
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434 Cumulative product of elements along dimension @var{dim}. If @var{dim}\n\ |
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435 is omitted, it defaults to 1 (column-wise cumulative products).\n\ |
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5642
|
436 @seealso{spcumsum}\n\ |
|
|
437 @end deftypefn") |
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5164
|
438 { |
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|
439 SPARSE_DIM_ARG_BODY (spcumprod, cumprod); |
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|
440 } |
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441 |
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442 // PKG_ADD: dispatch ("sum", "spsum", "sparse matrix"); |
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443 // PKG_ADD: dispatch ("sum", "spsum", "sparse complex matrix"); |
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444 // PKG_ADD: dispatch ("sum", "spsum", "sparse bool matrix"); |
|
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445 DEFUN_DLD (spsum, args, , |
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446 "-*- texinfo -*-\n\ |
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447 @deftypefn {Loadable Function} {@var{y} =} spsum (@var{x},@var{dim})\n\ |
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448 Sum of elements along dimension @var{dim}. If @var{dim} is omitted, it\n\ |
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449 defaults to 1 (column-wise sum).\n\ |
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5642
|
450 @seealso{spprod, spsumsq}\n\ |
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451 @end deftypefn") |
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5164
|
452 { |
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453 SPARSE_DIM_ARG_BODY (spsum, sum); |
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454 } |
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455 |
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456 // PKG_ADD: dispatch ("cumsum", "spcumsum", "sparse matrix"); |
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457 // PKG_ADD: dispatch ("cumsum", "spcumsum", "sparse complex matrix"); |
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458 // PKG_ADD: dispatch ("cumsum", "spcumsum", "sparse bool matrix"); |
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459 DEFUN_DLD (spcumsum, args, , |
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460 "-*- texinfo -*-\n\ |
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461 @deftypefn {Loadable Function} {@var{y} =} spcumsum (@var{x},@var{dim})\n\ |
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462 Cumulative sum of elements along dimension @var{dim}. If @var{dim}\n\ |
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463 is omitted, it defaults to 1 (column-wise cumulative sums).\n\ |
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5642
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464 @seealso{spcumprod}\n\ |
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465 @end deftypefn") |
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5164
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466 { |
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467 SPARSE_DIM_ARG_BODY (spcumsum, cumsum); |
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468 } |
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469 |
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470 // PKG_ADD: dispatch ("sumsq", "spsumsq", "sparse matrix"); |
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471 // PKG_ADD: dispatch ("sumsq", "spsumsq", "sparse complex matrix"); |
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472 // PKG_ADD: dispatch ("sumsq", "spsumsq", "sparse bool matrix"); |
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473 DEFUN_DLD (spsumsq, args, , |
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474 "-*- texinfo -*-\n\ |
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475 @deftypefn {Loadable Function} {@var{y} =} spsumsq (@var{x},@var{dim})\n\ |
|
|
476 Sum of squares of elements along dimension @var{dim}. If @var{dim}\n\ |
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477 is omitted, it defaults to 1 (column-wise sum of squares).\n\ |
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478 This function is equivalent to computing\n\ |
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|
479 @example\n\ |
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480 spsum (x .* spconj (x), dim)\n\ |
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481 @end example\n\ |
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|
482 but it uses less memory and avoids calling @code{spconj} if @var{x} is\n\ |
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|
483 real.\n\ |
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5642
|
484 @seealso{spprod, spsum}\n\ |
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485 @end deftypefn") |
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5164
|
486 { |
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487 SPARSE_DIM_ARG_BODY (spsumsq, sumsq); |
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|
488 } |
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489 |
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490 |
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491 static octave_value |
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492 make_spdiag (const octave_value& a, const octave_value& b) |
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493 { |
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494 octave_value retval; |
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495 |
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496 if (a.is_complex_type ()) |
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|
497 { |
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|
498 SparseComplexMatrix m = a.sparse_complex_matrix_value (); |
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5275
|
499 octave_idx_type k = b.nint_value(true); |
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5164
|
500 |
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|
501 if (error_state) |
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|
502 return retval; |
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|
503 |
|
5275
|
504 octave_idx_type nr = m.rows (); |
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|
505 octave_idx_type nc = m.columns (); |
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5164
|
506 |
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|
507 if (nr == 0 || nc == 0) |
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|
508 retval = m; |
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509 else if (nr == 1 || nc == 1) |
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510 { |
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5275
|
511 octave_idx_type roff = 0; |
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|
512 octave_idx_type coff = 0; |
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5164
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513 if (k > 0) |
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514 { |
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515 roff = 0; |
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|
516 coff = k; |
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517 } |
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518 else if (k < 0) |
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519 { |
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520 k = -k; |
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521 roff = k; |
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522 coff = 0; |
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523 } |
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524 |
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525 if (nr == 1) |
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526 { |
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5275
|
527 octave_idx_type n = nc + k; |
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5604
|
528 octave_idx_type nz = m.nzmax (); |
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5164
|
529 SparseComplexMatrix r (n, n, nz); |
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5275
|
530 for (octave_idx_type i = 0; i < coff+1; i++) |
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5164
|
531 r.xcidx (i) = 0; |
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5275
|
532 for (octave_idx_type j = 0; j < nc; j++) |
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5164
|
533 { |
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5275
|
534 for (octave_idx_type i = m.cidx(j); i < m.cidx(j+1); i++) |
|
5164
|
535 { |
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|
536 r.xdata (i) = m.data (i); |
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|
537 r.xridx (i) = j + roff; |
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|
538 } |
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|
539 r.xcidx (j+coff+1) = m.cidx(j+1); |
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|
540 } |
|
5275
|
541 for (octave_idx_type i = nc+coff+1; i < n+1; i++) |
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5164
|
542 r.xcidx (i) = nz; |
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|
543 retval = r; |
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|
544 } |
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|
545 else |
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|
546 { |
|
5275
|
547 octave_idx_type n = nr + k; |
|
5604
|
548 octave_idx_type nz = m.nzmax (); |
|
5275
|
549 octave_idx_type ii = 0; |
|
|
550 octave_idx_type ir = m.ridx(0); |
|
5164
|
551 SparseComplexMatrix r (n, n, nz); |
|
5275
|
552 for (octave_idx_type i = 0; i < coff+1; i++) |
|
5164
|
553 r.xcidx (i) = 0; |
|
5275
|
554 for (octave_idx_type i = 0; i < nr; i++) |
|
5164
|
555 { |
|
|
556 if (ir == i) |
|
|
557 { |
|
|
558 r.xdata (ii) = m.data (ii); |
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|
559 r.xridx (ii++) = ir + roff; |
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|
560 if (ii != nz) |
|
|
561 ir = m.ridx (ii); |
|
|
562 } |
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|
563 r.xcidx (i+coff+1) = ii; |
|
|
564 } |
|
5275
|
565 for (octave_idx_type i = nr+coff+1; i < n+1; i++) |
|
5164
|
566 r.xcidx (i) = nz; |
|
|
567 retval = r; |
|
|
568 } |
|
|
569 } |
|
|
570 else |
|
|
571 { |
|
|
572 SparseComplexMatrix r = m.diag (k); |
|
|
573 // Don't use numel, since it can overflow for very large matrices |
|
|
574 if (r.rows () > 0 && r.cols () > 0) |
|
|
575 retval = r; |
|
|
576 } |
|
|
577 } |
|
|
578 else if (a.is_real_type ()) |
|
|
579 { |
|
|
580 SparseMatrix m = a.sparse_matrix_value (); |
|
|
581 |
|
5275
|
582 octave_idx_type k = b.nint_value(true); |
|
5164
|
583 |
|
|
584 if (error_state) |
|
|
585 return retval; |
|
|
586 |
|
5275
|
587 octave_idx_type nr = m.rows (); |
|
|
588 octave_idx_type nc = m.columns (); |
|
5164
|
589 |
|
|
590 if (nr == 0 || nc == 0) |
|
|
591 retval = m; |
|
|
592 else if (nr == 1 || nc == 1) |
|
|
593 { |
|
5275
|
594 octave_idx_type roff = 0; |
|
|
595 octave_idx_type coff = 0; |
|
5164
|
596 if (k > 0) |
|
|
597 { |
|
|
598 roff = 0; |
|
|
599 coff = k; |
|
|
600 } |
|
|
601 else if (k < 0) |
|
|
602 { |
|
|
603 k = -k; |
|
|
604 roff = k; |
|
|
605 coff = 0; |
|
|
606 } |
|
|
607 |
|
|
608 if (nr == 1) |
|
|
609 { |
|
5275
|
610 octave_idx_type n = nc + k; |
|
5604
|
611 octave_idx_type nz = m.nzmax (); |
|
5164
|
612 SparseMatrix r (n, n, nz); |
|
|
613 |
|
5275
|
614 for (octave_idx_type i = 0; i < coff+1; i++) |
|
5164
|
615 r.xcidx (i) = 0; |
|
5275
|
616 for (octave_idx_type j = 0; j < nc; j++) |
|
5164
|
617 { |
|
5275
|
618 for (octave_idx_type i = m.cidx(j); i < m.cidx(j+1); i++) |
|
5164
|
619 { |
|
|
620 r.xdata (i) = m.data (i); |
|
|
621 r.xridx (i) = j + roff; |
|
|
622 } |
|
|
623 r.xcidx (j+coff+1) = m.cidx(j+1); |
|
|
624 } |
|
5275
|
625 for (octave_idx_type i = nc+coff+1; i < n+1; i++) |
|
5164
|
626 r.xcidx (i) = nz; |
|
|
627 retval = r; |
|
|
628 } |
|
|
629 else |
|
|
630 { |
|
5275
|
631 octave_idx_type n = nr + k; |
|
5604
|
632 octave_idx_type nz = m.nzmax (); |
|
5275
|
633 octave_idx_type ii = 0; |
|
|
634 octave_idx_type ir = m.ridx(0); |
|
5164
|
635 SparseMatrix r (n, n, nz); |
|
5275
|
636 for (octave_idx_type i = 0; i < coff+1; i++) |
|
5164
|
637 r.xcidx (i) = 0; |
|
5275
|
638 for (octave_idx_type i = 0; i < nr; i++) |
|
5164
|
639 { |
|
|
640 if (ir == i) |
|
|
641 { |
|
|
642 r.xdata (ii) = m.data (ii); |
|
|
643 r.xridx (ii++) = ir + roff; |
|
|
644 if (ii != nz) |
|
|
645 ir = m.ridx (ii); |
|
|
646 } |
|
|
647 r.xcidx (i+coff+1) = ii; |
|
|
648 } |
|
5275
|
649 for (octave_idx_type i = nr+coff+1; i < n+1; i++) |
|
5164
|
650 r.xcidx (i) = nz; |
|
|
651 retval = r; |
|
|
652 } |
|
|
653 } |
|
|
654 else |
|
|
655 { |
|
|
656 SparseMatrix r = m.diag (k); |
|
|
657 if (r.rows () > 0 && r.cols () > 0) |
|
|
658 retval = r; |
|
|
659 } |
|
|
660 } |
|
|
661 else |
|
|
662 gripe_wrong_type_arg ("spdiag", a); |
|
|
663 |
|
|
664 return retval; |
|
|
665 } |
|
|
666 |
|
6771
|
667 static octave_value |
|
|
668 make_spdiag (const octave_value& a) |
|
|
669 { |
|
|
670 octave_value retval; |
|
|
671 octave_idx_type nr = a.rows (); |
|
|
672 octave_idx_type nc = a.columns (); |
|
|
673 |
|
|
674 if (nr == 0 || nc == 0) |
|
|
675 retval = SparseMatrix (); |
|
|
676 else |
|
|
677 retval = make_spdiag (a, octave_value (0.)); |
|
|
678 |
|
|
679 return retval; |
|
|
680 } |
|
|
681 |
|
5164
|
682 // PKG_ADD: dispatch ("diag", "spdiag", "sparse matrix"); |
|
|
683 // PKG_ADD: dispatch ("diag", "spdiag", "sparse complex matrix"); |
|
|
684 // PKG_ADD: dispatch ("diag", "spdiag", "sparse bool matrix"); |
|
|
685 DEFUN_DLD (spdiag, args, , |
|
|
686 "-*- texinfo -*-\n\ |
|
|
687 @deftypefn {Loadable Function} {} spdiag (@var{v}, @var{k})\n\ |
|
|
688 Return a diagonal matrix with the sparse vector @var{v} on diagonal\n\ |
|
|
689 @var{k}. The second argument is optional. If it is positive, the vector is\n\ |
|
|
690 placed on the @var{k}-th super-diagonal. If it is negative, it is placed\n\ |
|
|
691 on the @var{-k}-th sub-diagonal. The default value of @var{k} is 0, and\n\ |
|
|
692 the vector is placed on the main diagonal. For example,\n\ |
|
|
693 \n\ |
|
|
694 @example\n\ |
|
6772
|
695 @group\n\ |
|
5164
|
696 spdiag ([1, 2, 3], 1)\n\ |
|
|
697 ans =\n\ |
|
|
698 \n\ |
|
|
699 Compressed Column Sparse (rows=4, cols=4, nnz=3)\n\ |
|
|
700 (1 , 2) -> 1\n\ |
|
|
701 (2 , 3) -> 2\n\ |
|
|
702 (3 , 4) -> 3\n\ |
|
6772
|
703 @end group\n\ |
|
5164
|
704 @end example\n\ |
|
6772
|
705 \n\ |
|
|
706 @noindent\n\ |
|
|
707 Given a matrix argument, instead of a vector, @code{spdiag} extracts the\n\ |
|
6774
|
708 @var{k}-th diagonal of the sparse matrix.\n\ |
|
5642
|
709 @seealso{diag}\n\ |
|
|
710 @end deftypefn") |
|
5164
|
711 { |
|
|
712 octave_value retval; |
|
|
713 |
|
|
714 int nargin = args.length (); |
|
|
715 |
|
|
716 if (nargin == 1 && args(0).is_defined ()) |
|
6771
|
717 retval = make_spdiag (args(0)); |
|
5164
|
718 else if (nargin == 2 && args(0).is_defined () && args(1).is_defined ()) |
|
|
719 retval = make_spdiag (args(0), args(1)); |
|
|
720 else |
|
5823
|
721 print_usage (); |
|
5164
|
722 |
|
|
723 return retval; |
|
|
724 } |
|
|
725 |
|
|
726 /* |
|
|
727 ;;; Local Variables: *** |
|
|
728 ;;; mode: C++ *** |
|
|
729 ;;; End: *** |
|
|
730 */ |
