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1 /* |
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2 |
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3 Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_NLEqn_h) |
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24 #define octave_NLEqn_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cfloat> |
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31 #include <cmath> |
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32 |
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33 #include "dColVector.h" |
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34 #include "NLFunc.h" |
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35 |
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36 class |
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37 NLEqn_options |
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38 { |
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39 public: |
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40 |
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41 NLEqn_options (void) |
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42 : x_tolerance (::sqrt (DBL_EPSILON)) { } |
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43 |
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44 NLEqn_options (const NLEqn_options& opt) |
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45 : x_tolerance (opt.x_tolerance) { } |
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46 |
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47 NLEqn_options& operator = (const NLEqn_options& opt) |
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48 { |
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49 if (this != &opt) |
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50 x_tolerance = opt.x_tolerance; |
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51 |
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52 return *this; |
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53 } |
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54 |
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55 ~NLEqn_options (void) { } |
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56 |
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57 void set_default_options (void) { x_tolerance = ::sqrt (DBL_EPSILON); } |
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58 |
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59 void set_options (const NLEqn_options& opt) |
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60 { x_tolerance = opt.x_tolerance; } |
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61 |
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62 void set_tolerance (double val) |
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63 { x_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
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64 |
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65 double tolerance (void) { return x_tolerance; } |
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66 |
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67 private: |
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68 |
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69 double x_tolerance; |
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70 }; |
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71 |
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72 class |
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73 NLEqn : public NLFunc, public NLEqn_options |
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74 { |
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75 public: |
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76 |
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77 NLEqn (void) |
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78 : NLFunc (), NLEqn_options (), x () { } |
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79 |
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80 NLEqn (const ColumnVector& xx, const NLFunc f) |
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81 : NLFunc (f), NLEqn_options (), x (xx) { } |
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82 |
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83 NLEqn (const NLEqn& a) |
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84 : NLFunc (a.fun, a.jac), NLEqn_options (), x (a.x) { } |
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85 |
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86 NLEqn& operator = (const NLEqn& a) |
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87 { |
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88 if (this != &a) |
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89 { |
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90 NLFunc::operator = (a); |
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91 NLEqn_options::operator = (a); |
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92 |
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93 x = a.x; |
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94 } |
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95 return *this; |
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96 } |
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97 |
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98 ~NLEqn (void) { } |
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99 |
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100 void set_states (const ColumnVector& xx) { x = xx; } |
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101 |
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102 ColumnVector states (void) const { return x; } |
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103 |
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104 int size (void) const { return x.capacity (); } |
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105 |
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106 ColumnVector solve (void) |
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107 { |
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108 int info; |
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109 return solve (info); |
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110 } |
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111 |
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112 ColumnVector solve (const ColumnVector& xvec) |
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113 { |
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114 set_states (xvec); |
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115 int info; |
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116 return solve (info); |
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117 } |
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118 |
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119 ColumnVector solve (const ColumnVector& xvec, int& info) |
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120 { |
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121 set_states (xvec); |
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122 return solve (info); |
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123 } |
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124 |
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125 ColumnVector solve (int& info); |
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126 |
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127 private: |
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128 |
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129 ColumnVector x; |
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130 |
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131 void error (const char* msg); |
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132 }; |
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133 |
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134 #endif |
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135 |
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136 /* |
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137 ;;; Local Variables: *** |
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138 ;;; mode: C++ *** |
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139 ;;; End: *** |
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140 */ |
