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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_base_min_h) |
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25 #define octave_base_min_h 1 |
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26 |
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27 #include "dColVector.h" |
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28 |
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29 class |
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30 base_minimizer |
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31 { |
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32 public: |
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33 |
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34 base_minimizer (void) : x () { } |
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35 |
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36 base_minimizer (const ColumnVector& xx) : x (xx) { } |
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37 |
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38 base_minimizer (const base_minimizer& a) : x (a.x) { } |
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39 |
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40 virtual ~base_minimizer (void) { } |
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41 |
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42 base_minimizer& operator = (const base_minimizer& a) |
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43 { |
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44 if (this != &a) |
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45 x = a.x; |
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46 |
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47 return *this; |
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48 } |
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49 |
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50 // Derived classes must provide a function to actually do the |
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51 // minimization. |
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52 |
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53 virtual ColumnVector do_minimize (double& objf, octave_idx_type& inform, |
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54 ColumnVector& lambda) = 0; |
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55 |
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56 // Lots of ways to call the single function and optionally set and |
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57 // get additional information. |
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58 |
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59 virtual ColumnVector minimize (void) |
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60 { |
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61 double objf; |
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62 octave_idx_type inform; |
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63 ColumnVector lambda; |
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64 return do_minimize (objf, inform, lambda); |
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65 } |
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66 |
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67 virtual ColumnVector minimize (double& objf) |
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68 { |
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69 octave_idx_type inform; |
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70 ColumnVector lambda; |
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71 return do_minimize (objf, inform, lambda); |
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72 } |
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73 |
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74 virtual ColumnVector minimize (double& objf, octave_idx_type& inform) |
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75 { |
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76 ColumnVector lambda; |
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77 return do_minimize (objf, inform, lambda); |
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78 } |
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79 |
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80 virtual ColumnVector minimize (double& objf, octave_idx_type& inform, |
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81 ColumnVector& lambda) |
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82 { |
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83 return do_minimize (objf, inform, lambda); |
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84 } |
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85 |
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86 virtual ColumnVector minimize (const ColumnVector& x0) |
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87 { |
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88 x = x0; |
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89 double objf; |
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90 octave_idx_type inform; |
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91 ColumnVector lambda; |
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92 return do_minimize (objf, inform, lambda); |
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93 } |
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94 |
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95 virtual ColumnVector minimize (const ColumnVector& x0, double& objf) |
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96 { |
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97 x = x0; |
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98 octave_idx_type inform; |
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99 ColumnVector lambda; |
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100 return do_minimize (objf, inform, lambda); |
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101 } |
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102 |
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103 virtual ColumnVector minimize (const ColumnVector& x0, double& objf, |
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104 octave_idx_type& inform) |
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105 { |
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106 x = x0; |
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107 ColumnVector lambda; |
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108 return do_minimize (objf, inform, lambda); |
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109 } |
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110 |
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111 virtual ColumnVector minimize (const ColumnVector& x0, double& objf, |
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112 octave_idx_type& inform, ColumnVector& lambda) |
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113 { |
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114 x = x0; |
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115 return do_minimize (objf, inform, lambda); |
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116 } |
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117 |
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118 octave_idx_type size (void) const { return x.capacity (); } |
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119 |
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120 protected: |
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121 |
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122 ColumnVector x; |
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123 }; |
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124 |
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125 #endif |
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126 |
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127 /* |
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128 ;;; Local Variables: *** |
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129 ;;; mode: C++ *** |
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130 ;;; End: *** |
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131 */ |
