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annotate liboctave/fDiagMatrix.h @ 8366:8b1a2555c4e2

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implement diagonal matrix objects * * *
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 03 Dec 2008 13:32:57 +0100
parents 82be108cc558
children 445d27d79f4e
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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
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32 #include "mx-defs.h"
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33
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34 class
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35 OCTAVE_API
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36 FloatDiagMatrix : public MDiagArray2<float>
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37 {
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38 friend class FloatSVD;
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39 friend class FloatComplexSVD;
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40
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41 public:
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42
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43 FloatDiagMatrix (void) : MDiagArray2<float> () { }
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44
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45 FloatDiagMatrix (octave_idx_type r, octave_idx_type c) : MDiagArray2<float> (r, c) { }
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46
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47 FloatDiagMatrix (octave_idx_type r, octave_idx_type c, float val) : MDiagArray2<float> (r, c, val) { }
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48
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49 FloatDiagMatrix (const FloatDiagMatrix& a) : MDiagArray2<float> (a) { }
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50
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51 FloatDiagMatrix (const MDiagArray2<float>& a) : MDiagArray2<float> (a) { }
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52
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53 template <class U>
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54 FloatDiagMatrix (const DiagArray2<U>& a) : MDiagArray2<float> (a) { }
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55
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56 explicit FloatDiagMatrix (const FloatRowVector& a) : MDiagArray2<float> (a) { }
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57
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58 explicit FloatDiagMatrix (const FloatColumnVector& a) : MDiagArray2<float> (a) { }
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59
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60 FloatDiagMatrix& operator = (const FloatDiagMatrix& a)
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61 {
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62 MDiagArray2<float>::operator = (a);
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63 return *this;
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64 }
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65
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66 bool operator == (const FloatDiagMatrix& a) const;
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67 bool operator != (const FloatDiagMatrix& a) const;
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68
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69 FloatDiagMatrix& fill (float val);
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70 FloatDiagMatrix& fill (float val, octave_idx_type beg, octave_idx_type end);
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71 FloatDiagMatrix& fill (const FloatColumnVector& a);
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72 FloatDiagMatrix& fill (const FloatRowVector& a);
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73 FloatDiagMatrix& fill (const FloatColumnVector& a, octave_idx_type beg);
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74 FloatDiagMatrix& fill (const FloatRowVector& a, octave_idx_type beg);
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75
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76 FloatDiagMatrix transpose (void) const { return MDiagArray2<float>::transpose(); }
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77 FloatDiagMatrix abs (void) const;
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78
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79 friend OCTAVE_API FloatDiagMatrix real (const FloatComplexDiagMatrix& a);
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80 friend OCTAVE_API FloatDiagMatrix imag (const FloatComplexDiagMatrix& a);
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81
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82 // resize is the destructive analog for this one
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83
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84 FloatMatrix extract (octave_idx_type r1, octave_idx_type c1, octave_idx_type r2, octave_idx_type c2) const;
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85
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86 // extract row or column i.
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87
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88 FloatRowVector row (octave_idx_type i) const;
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89 FloatRowVector row (char *s) const;
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90
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91 FloatColumnVector column (octave_idx_type i) const;
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92 FloatColumnVector column (char *s) const;
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93
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94 FloatDiagMatrix inverse (void) const;
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95 FloatDiagMatrix inverse (int& info) const;
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96
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97 // other operations
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98
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99 FloatColumnVector diag (octave_idx_type k = 0) const;
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100
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101 // i/o
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102
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103 friend OCTAVE_API std::ostream& operator << (std::ostream& os, const FloatDiagMatrix& a);
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104
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105 private:
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106
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107 FloatDiagMatrix (float *d, octave_idx_type nr, octave_idx_type nc) : MDiagArray2<float> (d, nr, nc) { }
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108 };
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109
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110 OCTAVE_API FloatDiagMatrix real (const FloatComplexDiagMatrix& a);
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111 OCTAVE_API FloatDiagMatrix imag (const FloatComplexDiagMatrix& a);
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112
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113 // diagonal matrix by diagonal matrix -> diagonal matrix operations
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114
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115 FloatDiagMatrix
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116 operator * (const FloatDiagMatrix& a, const FloatDiagMatrix& b);
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117
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118 MDIAGARRAY2_FORWARD_DEFS (MDiagArray2, FloatDiagMatrix, float)
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119
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120 #endif
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121
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122 /*
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123 ;;; Local Variables: ***
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124 ;;; mode: C++ ***
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125 ;;; End: ***
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126 */