annotate libinterp/dldfcn/symbfact.cc @ 17268:1c21f264d26f

doc: Rename @xcode macro to @tcode (transpose code) for clarity. * doc/interpreter/macros.texi: Rename macro @xcode to @tcode. * libinterp/corefcn/data.cc, libinterp/corefcn/lu.cc, libinterp/corefcn/schur.cc, libinterp/dldfcn/symbfact.cc, scripts/linear-algebra/krylov.m, scripts/sparse/etreeplot.m: Rename @xcode macro instances to @tcode.
author Rik <rik@octave.org>
date Sat, 17 Aug 2013 11:45:20 -0700
parents 49ebf4ad558b
children bc924baa2c4e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 2005-2012 David Bateman
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4 Copyright (C) 1998-2005 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 "SparseCmplxCHOL.h"
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29 #include "SparsedbleCHOL.h"
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30 #include "oct-spparms.h"
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31 #include "sparse-util.h"
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32 #include "oct-locbuf.h"
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33
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34 #include "ov-re-sparse.h"
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35 #include "ov-cx-sparse.h"
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36 #include "defun-dld.h"
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37 #include "error.h"
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38 #include "gripes.h"
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39 #include "oct-obj.h"
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40 #include "utils.h"
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41
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42 DEFUN_DLD (symbfact, args, nargout,
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43 "-*- texinfo -*-\n\
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44 @deftypefn {Loadable Function} {[@var{count}, @var{h}, @var{parent}, @var{post}, @var{r}] =} symbfact (@var{S})\n\
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45 @deftypefnx {Loadable Function} {[@dots{}] =} symbfact (@var{S}, @var{typ})\n\
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46 @deftypefnx {Loadable Function} {[@dots{}] =} symbfact (@var{S}, @var{typ}, @var{mode})\n\
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47 \n\
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48 Perform a symbolic factorization analysis on the sparse matrix @var{S}.\n\
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49 Where\n\
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50 \n\
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51 @table @var\n\
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52 @item S\n\
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53 @var{S} is a complex or real sparse matrix.\n\
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54 \n\
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55 @item typ\n\
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56 Is the type of the factorization and can be one of\n\
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57 \n\
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58 @table @samp\n\
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59 @item sym\n\
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60 Factorize @var{S}. This is the default.\n\
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61 \n\
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62 @item col\n\
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63 Factorize @code{@var{S}' * @var{S}}.\n\
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64 \n\
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65 @item row\n\
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66 Factorize @tcode{@var{S} * @var{S}'}.\n\
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67 \n\
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68 @item lo\n\
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69 Factorize @tcode{@var{S}'}\n\
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70 @end table\n\
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71 \n\
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72 @item mode\n\
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73 The default is to return the Cholesky@tie{}factorization for @var{r}, and if\n\
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74 @var{mode} is 'L', the conjugate transpose of the Cholesky@tie{}factorization\n\
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75 is returned. The conjugate transpose version is faster and uses less\n\
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76 memory, but returns the same values for @var{count}, @var{h}, @var{parent}\n\
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77 and @var{post} outputs.\n\
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78 @end table\n\
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79 \n\
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80 The output variables are\n\
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81 \n\
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82 @table @var\n\
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83 @item count\n\
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84 The row counts of the Cholesky@tie{}factorization as determined by @var{typ}.\n\
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85 \n\
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86 @item h\n\
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87 The height of the elimination tree.\n\
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88 \n\
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89 @item parent\n\
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90 The elimination tree itself.\n\
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91 \n\
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92 @item post\n\
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93 A sparse boolean matrix whose structure is that of the Cholesky\n\
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94 factorization as determined by @var{typ}.\n\
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95 @end table\n\
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96 @end deftypefn")
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97 {
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98 octave_value_list retval;
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99 int nargin = args.length ();
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100
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101 if (nargin < 1 || nargin > 3 || nargout > 5)
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102 {
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103 print_usage ();
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104 return retval;
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105 }
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106
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107 #ifdef HAVE_CHOLMOD
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108
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109 cholmod_common Common;
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110 cholmod_common *cm = &Common;
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111 CHOLMOD_NAME(start) (cm);
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112
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113 double spu = octave_sparse_params::get_key ("spumoni");
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114 if (spu == 0.)
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115 {
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116 cm->print = -1;
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117 cm->print_function = 0;
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118 }
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119 else
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120 {
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121 cm->print = static_cast<int> (spu) + 2;
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122 cm->print_function =&SparseCholPrint;
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123 }
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124
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125 cm->error_handler = &SparseCholError;
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126 cm->complex_divide = CHOLMOD_NAME(divcomplex);
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127 cm->hypotenuse = CHOLMOD_NAME(hypot);
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128
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129 double dummy;
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130 cholmod_sparse Astore;
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131 cholmod_sparse *A = &Astore;
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132 A->packed = true;
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133 A->sorted = true;
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134 A->nz = 0;
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135 #ifdef USE_64_BIT_IDX_T
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136 A->itype = CHOLMOD_LONG;
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137 #else
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138 A->itype = CHOLMOD_INT;
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139 #endif
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
140 A->dtype = CHOLMOD_DOUBLE;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
141 A->stype = 1;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
142 A->x = &dummy;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
143
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
144 if (args(0).is_real_type ())
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
145 {
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
146 const SparseMatrix a = args(0).sparse_matrix_value ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
147 A->nrow = a.rows ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
148 A->ncol = a.cols ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
149 A->p = a.cidx ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
150 A->i = a.ridx ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
151 A->nzmax = a.nnz ();
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
152 A->xtype = CHOLMOD_REAL;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
153
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
154 if (a.rows () > 0 && a.cols () > 0)
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
155 A->x = a.data ();
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
156 }
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
157 else if (args(0).is_complex_type ())
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
158 {
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
159 const SparseComplexMatrix a = args(0).sparse_complex_matrix_value ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
160 A->nrow = a.rows ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
161 A->ncol = a.cols ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
162 A->p = a.cidx ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
163 A->i = a.ridx ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
164 A->nzmax = a.nnz ();
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
165 A->xtype = CHOLMOD_COMPLEX;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
166
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
167 if (a.rows () > 0 && a.cols () > 0)
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
168 A->x = a.data ();
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
169 }
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
170 else
7789
82be108cc558 First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents: 7520
diff changeset
171 gripe_wrong_type_arg ("symbfact", args(0));
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
172
5527
ce71ed4c6da6 [project @ 2005-11-01 22:15:49 by jwe]
jwe
parents: 5512
diff changeset
173 octave_idx_type coletree = false;
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
174 octave_idx_type n = A->nrow;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
175
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
176 if (nargin > 1)
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
177 {
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
178 char ch;
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
179 std::string str = args(1).string_value ();
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
180 ch = tolower (str.c_str ()[0]);
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
181 if (ch == 'r')
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
182 A->stype = 0;
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
183 else if (ch == 'c')
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
184 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
185 n = A->ncol;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
186 coletree = true;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
187 A->stype = 0;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
188 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
189 else if (ch == 's')
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
190 A->stype = 1;
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
191 else if (ch == 's')
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
192 A->stype = -1;
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
193 else
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
194 error ("symbfact: unrecognized TYP in symbolic factorization");
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
195 }
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
196
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
197 if (A->stype && A->nrow != A->ncol)
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
198 error ("symbfact: S must be a square matrix");
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
199
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
200 if (!error_state)
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
201 {
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
202 OCTAVE_LOCAL_BUFFER (octave_idx_type, Parent, n);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
203 OCTAVE_LOCAL_BUFFER (octave_idx_type, Post, n);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
204 OCTAVE_LOCAL_BUFFER (octave_idx_type, ColCount, n);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
205 OCTAVE_LOCAL_BUFFER (octave_idx_type, First, n);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
206 OCTAVE_LOCAL_BUFFER (octave_idx_type, Level, n);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
207
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
208 cholmod_sparse *F = CHOLMOD_NAME(transpose) (A, 0, cm);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
209 cholmod_sparse *Aup, *Alo;
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
210
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
211 if (A->stype == 1 || coletree)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
212 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
213 Aup = A ;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
214 Alo = F ;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
215 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
216 else
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
217 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
218 Aup = F ;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
219 Alo = A ;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
220 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
221
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
222 CHOLMOD_NAME(etree) (Aup, Parent, cm);
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
223
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
224 if (cm->status < CHOLMOD_OK)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
225 {
14854
5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory
Rik <octave@nomad.inbox5.com>
parents: 14846
diff changeset
226 error ("matrix corrupted");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
227 goto symbfact_error;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
228 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
229
7520
b166043585a8 use 0 instead of NULL
John W. Eaton <jwe@octave.org>
parents: 7515
diff changeset
230 if (CHOLMOD_NAME(postorder) (Parent, n, 0, Post, cm) != n)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
231 {
14854
5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory
Rik <octave@nomad.inbox5.com>
parents: 14846
diff changeset
232 error ("postorder failed");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
233 goto symbfact_error;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
234 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
235
7520
b166043585a8 use 0 instead of NULL
John W. Eaton <jwe@octave.org>
parents: 7515
diff changeset
236 CHOLMOD_NAME(rowcolcounts) (Alo, 0, 0, Parent, Post, 0,
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
237 ColCount, First, Level, cm);
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
238
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
239 if (cm->status < CHOLMOD_OK)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
240 {
14854
5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory
Rik <octave@nomad.inbox5.com>
parents: 14846
diff changeset
241 error ("matrix corrupted");
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
242 goto symbfact_error;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
243 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
244
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
245 if (nargout > 4)
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
246 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
247 cholmod_sparse *A1, *A2;
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
248
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
249 if (A->stype == 1)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
250 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
251 A1 = A;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
252 A2 = 0;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
253 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
254 else if (A->stype == -1)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
255 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
256 A1 = F;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
257 A2 = 0;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
258 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
259 else if (coletree)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
260 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
261 A1 = F;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
262 A2 = A;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
263 }
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
264 else
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
265 {
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
266 A1 = A;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
267 A2 = F;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
268 }
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
269
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
270 // count the total number of entries in L
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
271 octave_idx_type lnz = 0 ;
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
272 for (octave_idx_type j = 0 ; j < n ; j++)
15020
560317fd5977 maint: Cuddle open bracket used for indexing C++ arrays in source code.
Rik <rik@octave.org>
parents: 14854
diff changeset
273 lnz += ColCount[j];
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
274
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
275
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
276 // allocate the output matrix L (pattern-only)
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents: 9064
diff changeset
277 SparseBoolMatrix L (n, n, lnz);
5506
b4cfbb0ec8c4 [project @ 2005-10-23 19:09:32 by dbateman]
dbateman
parents:
diff changeset
278
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279 // initialize column pointers
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280 lnz = 0;
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281 for (octave_idx_type j = 0 ; j < n ; j++)
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282 {
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283 L.xcidx(j) = lnz;
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284 lnz += ColCount[j];
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285 }
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286 L.xcidx(n) = lnz;
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287
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288
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289 /* create a copy of the column pointers */
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290 octave_idx_type *W = First;
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291 for (octave_idx_type j = 0 ; j < n ; j++)
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292 W[j] = L.xcidx (j);
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293
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294 // get workspace for computing one row of L
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295 cholmod_sparse *R
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296 = CHOLMOD_NAME (allocate_sparse) (n, 1, n, false, true,
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297 0, CHOLMOD_PATTERN, cm);
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298 octave_idx_type *Rp = static_cast<octave_idx_type *>(R->p);
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299 octave_idx_type *Ri = static_cast<octave_idx_type *>(R->i);
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300
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301 // compute L one row at a time
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302 for (octave_idx_type k = 0 ; k < n ; k++)
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303 {
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304 // get the kth row of L and store in the columns of L
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305 CHOLMOD_NAME (row_subtree) (A1, A2, k, Parent, R, cm) ;
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306 for (octave_idx_type p = 0 ; p < Rp[1] ; p++)
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307 L.xridx (W[Ri[p]]++) = k ;
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308
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309 // add the diagonal entry
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310 L.xridx (W[k]++) = k ;
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311 }
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312
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313 // free workspace
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314 CHOLMOD_NAME (free_sparse) (&R, cm) ;
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315
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316
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317 // transpose L to get R, or leave as is
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318 if (nargin < 3)
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319 L = L.transpose ();
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320
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321 // fill numerical values of L with one's
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322 for (octave_idx_type p = 0 ; p < lnz ; p++)
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323 L.xdata(p) = true;
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324
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325 retval(4) = L;
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326 }
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327
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328 ColumnVector tmp (n);
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329 if (nargout > 3)
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330 {
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331 for (octave_idx_type i = 0; i < n; i++)
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332 tmp(i) = Post[i] + 1;
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333 retval(3) = tmp;
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334 }
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335
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336 if (nargout > 2)
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337 {
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338 for (octave_idx_type i = 0; i < n; i++)
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339 tmp(i) = Parent[i] + 1;
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340 retval(2) = tmp;
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341 }
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342
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343 if (nargout > 1)
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344 {
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345 /* compute the elimination tree height */
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346 octave_idx_type height = 0 ;
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347 for (int i = 0 ; i < n ; i++)
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348 height = (height > Level[i] ? height : Level[i]);
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349 height++ ;
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350 retval(1) = static_cast<double> (height);
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351 }
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352
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353 for (octave_idx_type i = 0; i < n; i++)
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354 tmp(i) = ColCount[i];
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355 retval(0) = tmp;
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356 }
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357
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358 symbfact_error:
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359 #else
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diff changeset
360 error ("symbfact: not available in this version of Octave");
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361 #endif
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diff changeset
362
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363 return retval;
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364 }