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annotate liboctave/numeric/qr.h @ 23219:3ac9f9ecfae5 stable

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maint: Update copyright dates.
author John W. Eaton <jwe@octave.org>
date Wed, 22 Feb 2017 12:39:29 -0500
parents e9a0469dedd9
children 092078913d54
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1 /*
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2
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3 Copyright (C) 1994-2017 John W. Eaton
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4 Copyright (C) 2008-2009 Jaroslav Hajek
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5 Copyright (C) 2009 VZLU Prague
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6
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7 This file is part of Octave.
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8
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9 Octave is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 3 of the License, or (at your
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12 option) any later version.
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13
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14 Octave is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with Octave; see the file COPYING. If not, see
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21 <http://www.gnu.org/licenses/>.
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22
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23 */
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24
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25 #if ! defined (octave_qr_h)
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26 #define octave_qr_h 1
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27
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28 #include "octave-config.h"
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29
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30 #include "Array.h"
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31
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32 namespace octave
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33 {
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34 namespace math
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35 {
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36 template <typename T>
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37 class
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38 qr
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39 {
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40 public:
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41
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42 typedef typename T::element_type ELT_T;
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43 typedef typename T::row_vector_type RV_T;
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44 typedef typename T::column_vector_type CV_T;
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45
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46 enum type
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47 {
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48 std,
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49 raw,
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50 economy
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51 };
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52
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53 qr (void) : q (), r () { }
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54
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55 qr (const T& a, type qr_type = qr::std)
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56 : q (), r ()
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57 {
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58 init (a, qr_type);
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59 }
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60
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61 qr (const T& q, const T& r);
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62
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63 qr (const qr& a) : q (a.q), r (a.r) { }
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64
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65 qr& operator = (const qr& a)
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66 {
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67 if (this != &a)
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68 {
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69 q = a.q;
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70 r = a.r;
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71 }
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72
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73 return *this;
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74 }
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75
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76 virtual ~qr (void) { }
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77
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78 T Q (void) const { return q; }
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79
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80 T R (void) const { return r; }
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81
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82 type get_type (void) const;
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83
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84 bool regular (void) const;
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85
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86 void init (const T& a, type qr_type);
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87
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88 void update (const CV_T& u, const CV_T& v);
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89
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90 void update (const T& u, const T& v);
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91
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92 void insert_col (const CV_T& u, octave_idx_type j);
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93
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94 void insert_col (const T& u, const Array<octave_idx_type>& j);
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95
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96 void delete_col (octave_idx_type j);
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97
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98 void delete_col (const Array<octave_idx_type>& j);
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99
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100 void insert_row (const RV_T& u, octave_idx_type j);
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101
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102 void delete_row (octave_idx_type j);
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103
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104 void shift_cols (octave_idx_type i, octave_idx_type j);
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105
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106 protected:
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107
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108 T q;
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109 T r;
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110
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111 void form (octave_idx_type n, T& afact, ELT_T *tau, type qr_type);
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112 };
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113
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114 extern void warn_qrupdate_once (void);
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115 }
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116 }
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117
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118 #endif