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1 // -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 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 2, or (at your option) any |
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11 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, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_DiagMatrix_h) |
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25 #define octave_DiagMatrix_h 1 |
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26 |
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27 #if defined (__GNUG__) |
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28 #pragma interface |
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29 #endif |
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30 |
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31 #include "MArray.h" |
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32 |
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33 #include "dRowVector.h" |
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34 #include "dColVector.h" |
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35 |
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36 #include "mx-defs.h" |
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37 |
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38 class DiagMatrix : public MDiagArray<double> |
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39 { |
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40 friend class SVD; |
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41 friend class ComplexSVD; |
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42 |
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43 public: |
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44 |
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45 DiagMatrix (void) : MDiagArray<double> () { } |
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46 DiagMatrix (int n) : MDiagArray<double> (n) { } |
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47 DiagMatrix (int n, double val) : MDiagArray<double> (n, val) { } |
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48 DiagMatrix (int r, int c) : MDiagArray<double> (r, c) { } |
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49 DiagMatrix (int r, int c, double val) : MDiagArray<double> (r, c, val) { } |
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50 DiagMatrix (const RowVector& a) : MDiagArray<double> (a) { } |
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51 DiagMatrix (const ColumnVector& a) : MDiagArray<double> (a) { } |
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52 DiagMatrix (const MDiagArray<double>& a) : MDiagArray<double> (a) { } |
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53 DiagMatrix (const DiagMatrix& a) : MDiagArray<double> (a) { } |
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54 // DiagMatrix (double a) : MDiagArray<double> (1, a) { } |
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55 |
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56 DiagMatrix& operator = (const DiagMatrix& a) |
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57 { |
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58 MDiagArray<double>::operator = (a); |
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59 return *this; |
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60 } |
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61 |
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62 int operator == (const DiagMatrix& a) const; |
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63 int operator != (const DiagMatrix& a) const; |
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64 |
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65 DiagMatrix& fill (double val); |
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66 DiagMatrix& fill (double val, int beg, int end); |
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67 DiagMatrix& fill (const ColumnVector& a); |
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68 DiagMatrix& fill (const RowVector& a); |
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69 DiagMatrix& fill (const ColumnVector& a, int beg); |
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70 DiagMatrix& fill (const RowVector& a, int beg); |
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71 |
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72 DiagMatrix transpose (void) const; |
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73 |
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74 friend DiagMatrix real (const ComplexDiagMatrix& a); |
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75 friend DiagMatrix imag (const ComplexDiagMatrix& a); |
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76 |
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77 // resize is the destructive analog for this one |
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78 |
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79 Matrix extract (int r1, int c1, int r2, int c2) const; |
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80 |
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81 // extract row or column i. |
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82 |
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83 RowVector row (int i) const; |
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84 RowVector row (char *s) const; |
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85 |
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86 ColumnVector column (int i) const; |
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87 ColumnVector column (char *s) const; |
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88 |
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89 DiagMatrix inverse (void) const; |
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90 DiagMatrix inverse (int& info) const; |
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91 |
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92 // diagonal matrix by diagonal matrix -> diagonal matrix operations |
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93 |
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94 DiagMatrix& operator += (const DiagMatrix& a); |
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95 DiagMatrix& operator -= (const DiagMatrix& a); |
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96 |
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97 // diagonal matrix by diagonal matrix -> diagonal matrix operations |
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98 |
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99 friend DiagMatrix operator * (const DiagMatrix& a, |
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100 const DiagMatrix& b); |
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101 |
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102 // other operations |
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103 |
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104 ColumnVector diag (void) const; |
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105 ColumnVector diag (int k) const; |
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106 |
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107 // i/o |
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108 |
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109 friend ostream& operator << (ostream& os, const DiagMatrix& a); |
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110 |
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111 private: |
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112 |
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113 DiagMatrix (double *d, int nr, int nc) : MDiagArray<double> (d, nr, nc) { } |
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114 }; |
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115 |
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116 #endif |
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117 |
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118 /* |
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119 ;;; Local Variables: *** |
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120 ;;; mode: C++ *** |
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121 ;;; page-delimiter: "^/\\*" *** |
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122 ;;; End: *** |
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123 */ |
