1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
Copyright (C) 1996 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if !defined (octave_SVD_h)
#define octave_SVD_h 1
#if defined (__GNUG__)
#pragma interface
#endif
class ostream;
#include "dDiagMatrix.h"
#include "dMatrix.h"
class
SVD
{
public:
enum type
{
std,
economy,
sigma_only
};
SVD (void) : sigma (), left_sm (), right_sm () { }
SVD (const Matrix& a, type svd_type = SVD::std) { init (a, svd_type); }
SVD (const Matrix& a, int& info, type svd_type = SVD::std)
{
info = init (a, svd_type);
}
SVD (const SVD& a)
: sigma (a.sigma), left_sm (a.left_sm), right_sm (a.right_sm) { }
SVD& operator = (const SVD& a)
{
if (this != &a)
{
sigma = a.sigma;
left_sm = a.left_sm;
right_sm = a.right_sm;
}
return *this;
}
~SVD (void) { }
DiagMatrix singular_values (void) const { return sigma; }
Matrix left_singular_matrix (void) const;
Matrix right_singular_matrix (void) const;
friend ostream& operator << (ostream& os, const SVD& a);
private:
SVD::type type_computed;
DiagMatrix sigma;
Matrix left_sm;
Matrix right_sm;
int init (const Matrix& a, type svd_type = std);
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
|
