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annotate liboctave/fCRowVector.cc @ 10363:a0728e81ed25

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improve diag matrix interface & implementation
author Jaroslav Hajek <highegg@gmail.com>
date Fri, 26 Feb 2010 11:44:38 +0100
parents 12884915a8e4
children 141b3fb5cef7
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1 // RowVector manipulations.
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2 /*
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3
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4 Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003,
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eb63fbe60fab update copyright notices
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5 2004, 2005, 2006, 2007, 2008 John W. Eaton
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6
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7 This file is part of Octave.
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8
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9 Octave is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 3 of the License, or (at your
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12 option) any later version.
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13
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14 Octave is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with Octave; see the file COPYING. If not, see
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21 <http://www.gnu.org/licenses/>.
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22
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23 */
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24
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25 #ifdef HAVE_CONFIG_H
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26 #include <config.h>
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27 #endif
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28
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29 #include <iostream>
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30
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31 #include "Array-util.h"
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32 #include "f77-fcn.h"
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33 #include "functor.h"
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34 #include "lo-error.h"
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35 #include "mx-base.h"
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36 #include "mx-inlines.cc"
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37 #include "oct-cmplx.h"
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38
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39 // Fortran functions we call.
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40
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41 extern "C"
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42 {
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43 F77_RET_T
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44 F77_FUNC (cgemv, CGEMV) (F77_CONST_CHAR_ARG_DECL,
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45 const octave_idx_type&, const octave_idx_type&, const FloatComplex&,
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46 const FloatComplex*, const octave_idx_type&, const FloatComplex*,
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47 const octave_idx_type&, const FloatComplex&, FloatComplex*, const octave_idx_type&
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48 F77_CHAR_ARG_LEN_DECL);
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49
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50 F77_RET_T
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51 F77_FUNC (xcdotu, XCDOTU) (const octave_idx_type&, const FloatComplex*, const octave_idx_type&,
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52 const FloatComplex*, const octave_idx_type&, FloatComplex&);
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53 }
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54
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55 // FloatComplex Row Vector class
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56
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57 bool
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58 FloatComplexRowVector::operator == (const FloatComplexRowVector& a) const
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59 {
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60 octave_idx_type len = length ();
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61 if (len != a.length ())
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62 return 0;
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63 return mx_inline_equal (len, data (), a.data ());
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64 }
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65
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66 bool
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67 FloatComplexRowVector::operator != (const FloatComplexRowVector& a) const
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68 {
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69 return !(*this == a);
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70 }
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71
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72 // destructive insert/delete/reorder operations
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73
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74 FloatComplexRowVector&
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75 FloatComplexRowVector::insert (const FloatRowVector& a, octave_idx_type c)
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76 {
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77 octave_idx_type a_len = a.length ();
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78
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79 if (c < 0 || c + a_len > length ())
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80 {
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81 (*current_liboctave_error_handler) ("range error for insert");
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82 return *this;
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83 }
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84
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85 if (a_len > 0)
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86 {
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87 make_unique ();
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88
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89 for (octave_idx_type i = 0; i < a_len; i++)
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90 xelem (c+i) = a.elem (i);
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91 }
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92
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93 return *this;
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94 }
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95
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96 FloatComplexRowVector&
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97 FloatComplexRowVector::insert (const FloatComplexRowVector& a, octave_idx_type c)
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98 {
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99 octave_idx_type a_len = a.length ();
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100
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101 if (c < 0 || c + a_len > length ())
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102 {
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103 (*current_liboctave_error_handler) ("range error for insert");
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104 return *this;
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105 }
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106
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107 if (a_len > 0)
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108 {
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109 make_unique ();
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110
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111 for (octave_idx_type i = 0; i < a_len; i++)
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112 xelem (c+i) = a.elem (i);
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113 }
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114
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115 return *this;
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116 }
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117
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118 FloatComplexRowVector&
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119 FloatComplexRowVector::fill (float val)
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120 {
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121 octave_idx_type len = length ();
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122
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123 if (len > 0)
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124 {
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125 make_unique ();
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126
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127 for (octave_idx_type i = 0; i < len; i++)
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128 xelem (i) = val;
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129 }
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130
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131 return *this;
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132 }
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133
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134 FloatComplexRowVector&
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135 FloatComplexRowVector::fill (const FloatComplex& val)
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136 {
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137 octave_idx_type len = length ();
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138
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139 if (len > 0)
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140 {
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141 make_unique ();
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142
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143 for (octave_idx_type i = 0; i < len; i++)
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144 xelem (i) = val;
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145 }
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146
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147 return *this;
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148 }
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149
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150 FloatComplexRowVector&
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151 FloatComplexRowVector::fill (float val, octave_idx_type c1, octave_idx_type c2)
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152 {
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153 octave_idx_type len = length ();
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154
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155 if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len)
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156 {
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157 (*current_liboctave_error_handler) ("range error for fill");
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158 return *this;
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159 }
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160
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161 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; }
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162
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163 if (c2 >= c1)
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164 {
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165 make_unique ();
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166
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167 for (octave_idx_type i = c1; i <= c2; i++)
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168 xelem (i) = val;
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169 }
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170
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171 return *this;
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172 }
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173
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174 FloatComplexRowVector&
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175 FloatComplexRowVector::fill (const FloatComplex& val, octave_idx_type c1, octave_idx_type c2)
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176 {
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177 octave_idx_type len = length ();
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178
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179 if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len)
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180 {
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181 (*current_liboctave_error_handler) ("range error for fill");
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182 return *this;
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183 }
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184
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185 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; }
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186
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187 if (c2 >= c1)
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188 {
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189 make_unique ();
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190
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191 for (octave_idx_type i = c1; i <= c2; i++)
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192 xelem (i) = val;
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193 }
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194
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195 return *this;
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196 }
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197
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198 FloatComplexRowVector
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199 FloatComplexRowVector::append (const FloatRowVector& a) const
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200 {
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201 octave_idx_type len = length ();
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202 octave_idx_type nc_insert = len;
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203 FloatComplexRowVector retval (len + a.length ());
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204 retval.insert (*this, 0);
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205 retval.insert (a, nc_insert);
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206 return retval;
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207 }
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208
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209 FloatComplexRowVector
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210 FloatComplexRowVector::append (const FloatComplexRowVector& a) const
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211 {
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212 octave_idx_type len = length ();
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213 octave_idx_type nc_insert = len;
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214 FloatComplexRowVector retval (len + a.length ());
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215 retval.insert (*this, 0);
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216 retval.insert (a, nc_insert);
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217 return retval;
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218 }
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219
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220 FloatComplexColumnVector
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221 FloatComplexRowVector::hermitian (void) const
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222 {
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223 return MArray<FloatComplex>::hermitian (std::conj);
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224 }
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225
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226 FloatComplexColumnVector
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227 FloatComplexRowVector::transpose (void) const
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228 {
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229 return MArray<FloatComplex>::transpose ();
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230 }
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231
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232 FloatComplexRowVector
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233 conj (const FloatComplexRowVector& a)
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234 {
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235 return do_mx_unary_map<FloatComplex, FloatComplex, std::conj> (a);
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236 }
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237
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238 // resize is the destructive equivalent for this one
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239
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240 FloatComplexRowVector
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241 FloatComplexRowVector::extract (octave_idx_type c1, octave_idx_type c2) const
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242 {
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243 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; }
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244
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245 octave_idx_type new_c = c2 - c1 + 1;
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246
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247 FloatComplexRowVector result (new_c);
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248
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249 for (octave_idx_type i = 0; i < new_c; i++)
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250 result.elem (i) = elem (c1+i);
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251
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252 return result;
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253 }
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254
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255 FloatComplexRowVector
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256 FloatComplexRowVector::extract_n (octave_idx_type r1, octave_idx_type n) const
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257 {
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258 FloatComplexRowVector result (n);
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259
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260 for (octave_idx_type i = 0; i < n; i++)
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261 result.elem (i) = elem (r1+i);
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262
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263 return result;
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264 }
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265
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266 // row vector by row vector -> row vector operations
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267
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268 FloatComplexRowVector&
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269 FloatComplexRowVector::operator += (const FloatRowVector& a)
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270 {
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271 octave_idx_type len = length ();
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272
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273 octave_idx_type a_len = a.length ();
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274
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275 if (len != a_len)
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276 {
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277 gripe_nonconformant ("operator +=", len, a_len);
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278 return *this;
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279 }
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280
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281 if (len == 0)
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282 return *this;
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283
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284 FloatComplex *d = fortran_vec (); // Ensures only one reference to my privates!
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285
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286 mx_inline_add2 (len, d, a.data ());
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287 return *this;
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288 }
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289
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290 FloatComplexRowVector&
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291 FloatComplexRowVector::operator -= (const FloatRowVector& a)
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292 {
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293 octave_idx_type len = length ();
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294
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295 octave_idx_type a_len = a.length ();
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296
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297 if (len != a_len)
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298 {
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299 gripe_nonconformant ("operator -=", len, a_len);
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300 return *this;
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301 }
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302
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303 if (len == 0)
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304 return *this;
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305
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306 FloatComplex *d = fortran_vec (); // Ensures only one reference to my privates!
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307
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308 mx_inline_sub2 (len, d, a.data ());
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309 return *this;
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310 }
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311
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312 // row vector by matrix -> row vector
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313
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314 FloatComplexRowVector
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315 operator * (const FloatComplexRowVector& v, const FloatComplexMatrix& a)
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316 {
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317 FloatComplexRowVector retval;
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318
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319 octave_idx_type len = v.length ();
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320
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321 octave_idx_type a_nr = a.rows ();
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322 octave_idx_type a_nc = a.cols ();
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323
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324 if (a_nr != len)
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325 gripe_nonconformant ("operator *", 1, len, a_nr, a_nc);
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326 else
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327 {
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328 if (len == 0)
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329 retval.resize (a_nc, 0.0);
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330 else
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331 {
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332 // Transpose A to form A'*x == (x'*A)'
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333
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334 octave_idx_type ld = a_nr;
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335
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336 retval.resize (a_nc);
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337 FloatComplex *y = retval.fortran_vec ();
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338
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339 F77_XFCN (cgemv, CGEMV, (F77_CONST_CHAR_ARG2 ("T", 1),
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340 a_nr, a_nc, 1.0, a.data (),
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341 ld, v.data (), 1, 0.0, y, 1
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342 F77_CHAR_ARG_LEN (1)));
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343 }
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344 }
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345
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346 return retval;
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347 }
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348
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349 FloatComplexRowVector
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350 operator * (const FloatRowVector& v, const FloatComplexMatrix& a)
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351 {
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352 FloatComplexRowVector tmp (v);
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353 return tmp * a;
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354 }
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355
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356 // other operations
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357
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358 FloatComplex
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359 FloatComplexRowVector::min (void) const
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360 {
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361 octave_idx_type len = length ();
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362 if (len == 0)
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363 return FloatComplex (0.0);
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364
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365 FloatComplex res = elem (0);
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366 float absres = std::abs (res);
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367
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368 for (octave_idx_type i = 1; i < len; i++)
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369 if (std::abs (elem (i)) < absres)
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370 {
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371 res = elem (i);
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372 absres = std::abs (res);
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373 }
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374
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375 return res;
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376 }
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377
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378 FloatComplex
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379 FloatComplexRowVector::max (void) const
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380 {
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381 octave_idx_type len = length ();
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382 if (len == 0)
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383 return FloatComplex (0.0);
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384
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385 FloatComplex res = elem (0);
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386 float absres = std::abs (res);
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387
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388 for (octave_idx_type i = 1; i < len; i++)
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389 if (std::abs (elem (i)) > absres)
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390 {
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391 res = elem (i);
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392 absres = std::abs (res);
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393 }
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394
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395 return res;
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396 }
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397
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398 // i/o
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399
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400 std::ostream&
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401 operator << (std::ostream& os, const FloatComplexRowVector& a)
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402 {
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403 // int field_width = os.precision () + 7;
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404 for (octave_idx_type i = 0; i < a.length (); i++)
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405 os << " " /* setw (field_width) */ << a.elem (i);
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406 return os;
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407 }
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408
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409 std::istream&
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410 operator >> (std::istream& is, FloatComplexRowVector& a)
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411 {
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412 octave_idx_type len = a.length();
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413
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414 if (len > 0)
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415 {
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416 FloatComplex tmp;
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417 for (octave_idx_type i = 0; i < len; i++)
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418 {
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419 is >> tmp;
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420 if (is)
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421 a.elem (i) = tmp;
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422 else
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423 break;
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424 }
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425 }
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426 return is;
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427 }
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428
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429 // row vector by column vector -> scalar
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430
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431 // row vector by column vector -> scalar
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432
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433 FloatComplex
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434 operator * (const FloatComplexRowVector& v, const FloatColumnVector& a)
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435 {
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436 FloatComplexColumnVector tmp (a);
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437 return v * tmp;
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438 }
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439
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440 FloatComplex
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441 operator * (const FloatComplexRowVector& v, const FloatComplexColumnVector& a)
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442 {
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443 FloatComplex retval (0.0, 0.0);
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444
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445 octave_idx_type len = v.length ();
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446
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447 octave_idx_type a_len = a.length ();
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448
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449 if (len != a_len)
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450 gripe_nonconformant ("operator *", len, a_len);
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451 else if (len != 0)
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452 F77_FUNC (xcdotu, XCDOTU) (len, v.data (), 1, a.data (), 1, retval);
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453
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454 return retval;
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455 }
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456
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457 // other operations
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diff changeset
458
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459 FloatComplexRowVector
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460 linspace (const FloatComplex& x1, const FloatComplex& x2, octave_idx_type n)
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461 {
9653
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diff changeset
462 if (n < 1) n = 1;
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463
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464 NoAlias<FloatComplexRowVector> retval (n);
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465
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466 FloatComplex delta = (x2 - x1) / (n - 1.0f);
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diff changeset
467 retval(0) = x1;
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468 for (octave_idx_type i = 1; i < n-1; i++)
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469 retval(i) = x1 + static_cast<float> (i)*delta;
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diff changeset
470 retval(n-1) = x2;
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471
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472 return retval;
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473 }