GNU Octave  3.8.0
A high-level interpreted language, primarily intended for numerical computations, mostly compatible with Matlab
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op-dm-sm.cc
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1 /*
2 
3 Copyright (C) 2009-2013 Jason Riedy, Jaroslav Hajek
4 
5 This file is part of Octave.
6 
7 Octave is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
11 
12 Octave is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16 
17 You should have received a copy of the GNU General Public License
18 along with Octave; see the file COPYING. If not, see
19 <http://www.gnu.org/licenses/>.
20 
21 */
22 
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26 
27 #include "gripes.h"
28 #include "oct-obj.h"
29 #include "ov.h"
30 #include "ov-typeinfo.h"
31 #include "ops.h"
32 
33 #include "ov-re-diag.h"
34 #include "ov-re-sparse.h"
35 
36 #include "sparse-xdiv.h"
37 
38 // diagonal matrix by sparse matrix ops
39 
40 DEFBINOP (mul_dm_sm, diag_matrix, sparse_matrix)
41 {
43 
44  if (v2.rows () == 1 && v2.columns () == 1)
45  // If v2 is a scalar in disguise, return a diagonal matrix rather than
46  // a sparse matrix.
47  {
48  double d = v2.scalar_value ();
49 
50  return octave_value (v1.diag_matrix_value () * d);
51  }
52  else
53  {
54  MatrixType typ = v2.matrix_type ();
56  octave_value out = octave_value (ret);
57  typ.mark_as_unsymmetric ();
58  out.matrix_type (typ);
59  return out;
60  }
61 }
62 
63 DEFBINOP (ldiv_dm_sm, diag_matrix, sparse_matrix)
64 {
66 
67  MatrixType typ = v2.matrix_type ();
68  return xleftdiv (v1.diag_matrix_value (), v2.sparse_matrix_value (), typ);
69 }
70 
71 DEFBINOP (add_dm_sm, diag_matrix, sparse_matrix)
72 {
74 
75  if (v2.rows () == 1 && v2.columns () == 1)
76  // If v2 is a scalar in disguise, return a diagonal matrix rather than
77  // a sparse matrix.
78  {
79  double d = v2.scalar_value ();
80 
81  return octave_value (v1.matrix_value () + d);
82  }
83  else
85 }
86 
87 DEFBINOP (sub_dm_sm, diag_matrix, sparse_matrix)
88 {
90 
91  if (v2.rows () == 1 && v2.columns () == 1)
92  // If v2 is a scalar in disguise, return a diagonal matrix rather than
93  // a sparse matrix.
94  {
95  double d = v2.scalar_value ();
96 
97  return octave_value (v1.matrix_value () - d);
98  }
99  else
101 }
102 
103 // sparse matrix by diagonal matrix ops
104 
105 DEFBINOP (mul_sm_dm, sparse_matrix, diag_matrix)
106 {
108 
109  if (v1.rows () == 1 && v1.columns () == 1)
110  // If v1 is a scalar in disguise, return a diagonal matrix rather than
111  // a sparse matrix.
112  {
113  double d = v1.scalar_value ();
114 
115  return octave_value (d * v2.diag_matrix_value ());
116  }
117  else
118  {
119  MatrixType typ = v1.matrix_type ();
121  octave_value out = octave_value (ret);
122  typ.mark_as_unsymmetric ();
123  out.matrix_type (typ);
124  return out;
125  }
126 }
127 
128 DEFBINOP (div_sm_dm, sparse_matrix, diag_matrix)
129 {
131 
132  if (v2.rows () == 1 && v2.columns () == 1)
133  {
134  double d = v2.scalar_value ();
135 
136  if (d == 0.0)
138 
139  return octave_value (v1.sparse_matrix_value () / d);
140  }
141  else
142  {
143  MatrixType typ = v2.matrix_type ();
144  return xdiv (v1.sparse_matrix_value (), v2.diag_matrix_value (), typ);
145  }
146 }
147 
148 DEFBINOP (add_sm_dm, sparse_matrix, diag_matrix)
149 {
151 
152  if (v1.rows () == 1 && v1.columns () == 1)
153  // If v1 is a scalar in disguise, return a diagonal matrix rather than
154  // a sparse matrix.
155  {
156  double d = v1.scalar_value ();
157 
158  return octave_value (d + v2.matrix_value ());
159  }
160  else
162 }
163 
164 DEFBINOP (sub_sm_dm, sparse_matrix, diag_matrix)
165 {
167 
168  if (v1.rows () == 1 && v1.columns () == 1)
169  // If v1 is a scalar in disguise, return a diagonal matrix rather than
170  // a sparse matrix.
171  {
172  double d = v1.scalar_value ();
173 
174  return octave_value (d - v2.matrix_value ());
175  }
176  else
178 }
179 
180 void
182 {
184  mul_dm_sm);
185 
189 
191  mul_sm_dm);
192 
196 }