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annotate liboctave/numeric/CollocWt.h @ 31606:dfa5d9c3ae72

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maint: merge stable to default
author Rik <rik@octave.org>
date Thu, 01 Dec 2022 14:28:07 -0800
parents db8735ee84da e88a07dec498
children 23664317f0d3
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1993-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_CollocWt_h)
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27 #define octave_CollocWt_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <iosfwd>
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32
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33 #include "dMatrix.h"
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34 #include "dColVector.h"
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35
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36 OCTAVE_BEGIN_NAMESPACE(octave)
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37
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38 class OCTAVE_API CollocWt
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39 {
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40 public:
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41
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42 CollocWt (void)
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43 : m_n (0), m_inc_left (0), m_inc_right (0), m_lb (0.0), m_rb (1.0),
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44 m_alpha (0.0), m_beta (0.0), m_r (), m_q (), m_A (), m_B (),
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45 m_initialized (false)
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46 { }
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47
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48 CollocWt (octave_idx_type nc, octave_idx_type il, octave_idx_type ir)
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49 : m_n (nc), m_inc_left (il), m_inc_right (ir), m_lb (0.0), m_rb (1.0),
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50 m_alpha (0.0), m_beta (0.0), m_r (), m_q (), m_A (), m_B (),
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51 m_initialized (false)
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52 { }
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53
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54 CollocWt (octave_idx_type nc, octave_idx_type il, octave_idx_type ir,
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55 double l, double rr)
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56 : m_n (nc), m_inc_left (il), m_inc_right (ir), m_lb (l), m_rb (rr),
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57 m_alpha (0.0), m_beta (0.0), m_r (), m_q (), m_A (), m_B (),
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58 m_initialized (false)
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59 { }
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60
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61 CollocWt (octave_idx_type nc, double a, double b, octave_idx_type il,
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62 octave_idx_type ir)
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63 : m_n (nc), m_inc_left (il), m_inc_right (ir), m_lb (0.0), m_rb (1.0),
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64 m_alpha (a), m_beta (b), m_r (), m_q (), m_A (), m_B (),
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65 m_initialized (false)
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66 { }
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67
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68 CollocWt (octave_idx_type nc, double a, double b, octave_idx_type il,
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69 octave_idx_type ir,
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70 double ll, double rr)
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71 : m_n (nc), m_inc_left (il), m_inc_right (ir), m_lb (ll), m_rb (rr),
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72 m_alpha (a), m_beta (b), m_r (), m_q (), m_A (), m_B (),
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73 m_initialized (false)
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74 { }
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75
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76 CollocWt (const CollocWt& a) = default;
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77
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78 CollocWt& operator = (const CollocWt& a) = default;
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79
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80 ~CollocWt (void) = default;
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81
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82 CollocWt& resize (octave_idx_type nc)
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83 {
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84 m_n = nc;
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85 m_initialized = false;
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86 return *this;
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87 }
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88
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89 CollocWt& add_left (void)
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90 {
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91 m_inc_left = 1;
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92 m_initialized = false;
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93 return *this;
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94 }
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95
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96 CollocWt& delete_left (void)
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97 {
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98 m_inc_left = 0;
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99 m_initialized = false;
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100 return *this;
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101 }
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102
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103 CollocWt& set_left (double val);
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104
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105 CollocWt& add_right (void)
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106 {
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107 m_inc_right = 1;
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108 m_initialized = false;
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109 return *this;
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110 }
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111
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112 CollocWt& delete_right (void)
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113 {
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114 m_inc_right = 0;
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115 m_initialized = false;
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116 return *this;
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117 }
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118
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119 CollocWt& set_right (double val);
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120
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121 CollocWt& set_alpha (double val)
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122 {
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123 m_alpha = val;
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124 m_initialized = false;
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125 return *this;
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126 }
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127
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128 CollocWt& set_beta (double val)
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129 {
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130 m_beta = val;
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131 m_initialized = false;
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132 return *this;
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133 }
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134
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135 octave_idx_type ncol (void) const { return m_n; }
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136
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137 octave_idx_type left_included (void) const { return m_inc_left; }
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138 octave_idx_type right_included (void) const { return m_inc_right; }
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139
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140 double left (void) const { return m_lb; }
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141 double right (void) const { return m_rb; }
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142
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143 double width (void) const { return m_rb - m_lb; }
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144
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145 double alpha (void) const { return m_alpha; }
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146 double beta (void) const { return m_beta; }
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147
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148 ColumnVector roots (void)
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149 {
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150 if (! m_initialized)
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151 init ();
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152
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153 return m_r;
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154 }
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155
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156 ColumnVector quad (void)
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157 {
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158 if (! m_initialized)
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159 init ();
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160
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161 return m_q;
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162 }
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163
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164 ColumnVector quad_weights (void) { return quad (); }
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165
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166 Matrix first (void)
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167 {
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168 if (! m_initialized)
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169 init ();
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170
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171 return m_A;
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172 }
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173
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174 Matrix second (void)
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175 {
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176 if (! m_initialized)
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177 init ();
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178
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179 return m_B;
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180 }
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181
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182 friend std::ostream& operator << (std::ostream&, const CollocWt&);
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183
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184 protected:
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185
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186 octave_idx_type m_n;
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187
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188 octave_idx_type m_inc_left;
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189 octave_idx_type m_inc_right;
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190
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191 double m_lb;
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192 double m_rb;
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193
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194 double m_alpha;
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195 double m_beta;
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196
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197 ColumnVector m_r;
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198 ColumnVector m_q;
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199
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200 Matrix m_A;
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201 Matrix m_B;
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202
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203 bool m_initialized;
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204
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205 void init (void);
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206
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207 void error (const char *msg);
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208 };
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209
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210 OCTAVE_END_NAMESPACE(octave)
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211
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212 #endif