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1 // base-min.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 base_minimizer |
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30 { |
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31 public: |
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32 |
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33 base_minimizer (void) : x () { } |
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34 |
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35 base_minimizer (const ColumnVector& xx) : x (xx) { } |
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36 |
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37 base_minimizer (const base_minimizer& a) { x = a.x; } |
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38 |
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39 virtual ~base_minimizer (void) { } |
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40 |
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41 base_minimizer& operator = (const base_minimizer& a) |
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42 { |
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43 x = a.x; |
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44 |
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45 return *this; |
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46 } |
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47 |
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48 // Derived classes must provide a function to actually do the |
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49 // minimization. |
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50 |
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51 virtual ColumnVector do_minimize (double& objf, int& inform, |
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52 ColumnVector& lambda) = 0; |
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53 |
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54 // Lots of ways to call the single function and optionally set and |
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55 // get additional information. |
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56 |
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57 virtual ColumnVector minimize (void) |
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58 { |
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59 double objf; |
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60 int inform; |
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61 ColumnVector lambda; |
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62 return do_minimize (objf, inform, lambda); |
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63 } |
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64 |
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65 virtual ColumnVector minimize (double& objf) |
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66 { |
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67 int inform; |
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68 ColumnVector lambda; |
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69 return do_minimize (objf, inform, lambda); |
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70 } |
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71 |
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72 virtual ColumnVector minimize (double& objf, int& inform) |
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73 { |
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74 ColumnVector lambda; |
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75 return do_minimize (objf, inform, lambda); |
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76 } |
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77 |
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78 virtual ColumnVector minimize (double& objf, int& inform, |
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79 ColumnVector& lambda) |
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80 { |
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81 return do_minimize (objf, inform, lambda); |
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82 } |
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83 |
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84 virtual ColumnVector minimize (const ColumnVector& x0) |
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85 { |
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86 x = x0; |
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87 double objf; |
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88 int inform; |
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89 ColumnVector lambda; |
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90 return do_minimize (objf, inform, lambda); |
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91 } |
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92 |
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93 virtual ColumnVector minimize (const ColumnVector& x0, double& objf) |
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94 { |
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95 x = x0; |
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96 int inform; |
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97 ColumnVector lambda; |
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98 return do_minimize (objf, inform, lambda); |
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99 } |
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100 |
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101 virtual ColumnVector minimize (const ColumnVector& x0, double& objf, |
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102 int& inform) |
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103 { |
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104 x = x0; |
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105 ColumnVector lambda; |
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106 return do_minimize (objf, inform, lambda); |
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107 } |
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108 |
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109 virtual ColumnVector minimize (const ColumnVector& x0, double& objf, |
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110 int& inform, ColumnVector& lambda) |
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111 { |
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112 x = x0; |
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113 return do_minimize (objf, inform, lambda); |
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114 } |
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115 |
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116 int size (void) const { return x.capacity (); } |
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117 |
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118 protected: |
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119 |
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120 ColumnVector x; |
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121 }; |
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122 |
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123 #endif |
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124 |
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125 /* |
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126 ;;; Local Variables: *** |
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127 ;;; mode: C++ *** |
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128 ;;; page-delimiter: "^/\\*" *** |
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129 ;;; End: *** |
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130 */ |
