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annotate liboctave/fDiagMatrix.h @ 8371:c3f7e2549abb

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make det & inv aware of diagonal & permutation matrices
author Jaroslav Hajek <highegg@gmail.com>
date Thu, 04 Dec 2008 12:03:45 +0100
parents 445d27d79f4e
children e3c9102431a9
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1 /*
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2
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3 Copyright (C) 1994, 1995, 1996, 1997, 2000, 2002, 2004, 2005, 2006,
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4 2007 John W. Eaton
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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 #if !defined (octave_FloatDiagMatrix_h)
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25 #define octave_FloatDiagMatrix_h 1
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26
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27 #include "MDiagArray2.h"
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28
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29 #include "fRowVector.h"
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30 #include "fColVector.h"
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31 #include "DET.h"
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32
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33 #include "mx-defs.h"
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34
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35 class
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36 OCTAVE_API
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37 FloatDiagMatrix : public MDiagArray2<float>
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38 {
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39 friend class FloatSVD;
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40 friend class FloatComplexSVD;
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41
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42 public:
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43
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44 FloatDiagMatrix (void) : MDiagArray2<float> () { }
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45
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46 FloatDiagMatrix (octave_idx_type r, octave_idx_type c) : MDiagArray2<float> (r, c) { }
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47
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48 FloatDiagMatrix (octave_idx_type r, octave_idx_type c, float val) : MDiagArray2<float> (r, c, val) { }
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49
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50 FloatDiagMatrix (const FloatDiagMatrix& a) : MDiagArray2<float> (a) { }
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51
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52 FloatDiagMatrix (const MDiagArray2<float>& a) : MDiagArray2<float> (a) { }
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53
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54 template <class U>
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55 FloatDiagMatrix (const DiagArray2<U>& a) : MDiagArray2<float> (a) { }
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56
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57 explicit FloatDiagMatrix (const FloatRowVector& a) : MDiagArray2<float> (a) { }
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58
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59 explicit FloatDiagMatrix (const FloatColumnVector& a) : MDiagArray2<float> (a) { }
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60
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61 FloatDiagMatrix& operator = (const FloatDiagMatrix& a)
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62 {
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63 MDiagArray2<float>::operator = (a);
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64 return *this;
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65 }
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66
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67 bool operator == (const FloatDiagMatrix& a) const;
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68 bool operator != (const FloatDiagMatrix& a) const;
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69
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70 FloatDiagMatrix& fill (float val);
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71 FloatDiagMatrix& fill (float val, octave_idx_type beg, octave_idx_type end);
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72 FloatDiagMatrix& fill (const FloatColumnVector& a);
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73 FloatDiagMatrix& fill (const FloatRowVector& a);
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74 FloatDiagMatrix& fill (const FloatColumnVector& a, octave_idx_type beg);
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75 FloatDiagMatrix& fill (const FloatRowVector& a, octave_idx_type beg);
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76
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77 FloatDiagMatrix transpose (void) const { return MDiagArray2<float>::transpose(); }
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78 FloatDiagMatrix abs (void) const;
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79
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80 friend OCTAVE_API FloatDiagMatrix real (const FloatComplexDiagMatrix& a);
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81 friend OCTAVE_API FloatDiagMatrix imag (const FloatComplexDiagMatrix& a);
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82
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83 // resize is the destructive analog for this one
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84
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85 FloatMatrix extract (octave_idx_type r1, octave_idx_type c1, octave_idx_type r2, octave_idx_type c2) const;
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86
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87 // extract row or column i.
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88
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89 FloatRowVector row (octave_idx_type i) const;
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90 FloatRowVector row (char *s) const;
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91
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92 FloatColumnVector column (octave_idx_type i) const;
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93 FloatColumnVector column (char *s) const;
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94
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95 FloatDiagMatrix inverse (void) const;
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96 FloatDiagMatrix inverse (int& info) const;
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97
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98 // other operations
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99
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100 FloatColumnVector diag (octave_idx_type k = 0) const;
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101
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102 FloatDET determinant (void) const;
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103 float rcond (void) const;
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104
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105 // i/o
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106
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107 friend OCTAVE_API std::ostream& operator << (std::ostream& os, const FloatDiagMatrix& a);
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108
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109 private:
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110
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111 FloatDiagMatrix (float *d, octave_idx_type nr, octave_idx_type nc) : MDiagArray2<float> (d, nr, nc) { }
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112 };
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113
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114 OCTAVE_API FloatDiagMatrix real (const FloatComplexDiagMatrix& a);
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115 OCTAVE_API FloatDiagMatrix imag (const FloatComplexDiagMatrix& a);
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116
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117 // diagonal matrix by diagonal matrix -> diagonal matrix operations
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118
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119 FloatDiagMatrix
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120 operator * (const FloatDiagMatrix& a, const FloatDiagMatrix& b);
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121
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122 MDIAGARRAY2_FORWARD_DEFS (MDiagArray2, FloatDiagMatrix, float)
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123
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124 #endif
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125
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126 /*
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127 ;;; Local Variables: ***
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128 ;;; mode: C++ ***
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129 ;;; End: ***
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130 */