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annotate liboctave/array/fDiagMatrix.cc @ 18084:8e056300994b

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Follow coding convention of defining and initializing only 1 variable per line in liboctave. * liboctave/array/Array-b.cc, liboctave/array/Array-util.cc, liboctave/array/Array.cc, liboctave/array/CDiagMatrix.cc, liboctave/array/CMatrix.cc, liboctave/array/CSparse.cc, liboctave/array/MDiagArray2.cc, liboctave/array/MatrixType.cc, liboctave/array/PermMatrix.cc, liboctave/array/Sparse.cc, liboctave/array/Sparse.h, liboctave/array/boolSparse.cc, liboctave/array/dDiagMatrix.cc, liboctave/array/dMatrix.cc, liboctave/array/dSparse.cc, liboctave/array/dim-vector.cc, liboctave/array/fCDiagMatrix.cc, liboctave/array/fCMatrix.cc, liboctave/array/fDiagMatrix.cc, liboctave/array/fMatrix.cc, liboctave/array/idx-vector.cc, liboctave/array/idx-vector.h, liboctave/numeric/CmplxLU.cc, liboctave/numeric/CmplxQR.cc, liboctave/numeric/base-qr.cc, liboctave/numeric/bsxfun-defs.cc, liboctave/numeric/bsxfun.h, liboctave/numeric/dbleLU.cc, liboctave/numeric/dbleQR.cc, liboctave/numeric/fCmplxLU.cc, liboctave/numeric/fCmplxQR.cc, liboctave/numeric/floatLU.cc, liboctave/numeric/floatQR.cc, liboctave/numeric/lo-specfun.cc, liboctave/numeric/oct-convn.cc, liboctave/numeric/oct-norm.cc, liboctave/numeric/sparse-dmsolve.cc, liboctave/operators/mx-inlines.cc, liboctave/operators/mx-op-defs.h, liboctave/util/caseless-str.h, liboctave/util/kpse.cc, liboctave/util/lo-utils.cc, liboctave/util/oct-binmap.h, liboctave/util/oct-cmplx.h, liboctave/util/oct-inttypes.cc, liboctave/util/oct-inttypes.h, liboctave/util/oct-sort.cc: Follow coding convention of defining and initializing only 1 variable per line in liboctave.
author Rik <rik@octave.org>
date Wed, 04 Dec 2013 22:13:18 -0800
parents 49a5a4be04a1
children c5a101de2d88
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1 // FloatDiagMatrix manipulations.
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2 /*
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3
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d63878346099 maint: Update copyright notices for release.
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4 Copyright (C) 1994-2013 John W. Eaton
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5 Copyright (C) 2009 VZLU Prague
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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 "lo-error.h"
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33 #include "mx-base.h"
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34 #include "mx-inlines.cc"
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35 #include "oct-cmplx.h"
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36
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37 // Diagonal Matrix class.
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38
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39 bool
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40 FloatDiagMatrix::operator == (const FloatDiagMatrix& a) const
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41 {
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42 if (rows () != a.rows () || cols () != a.cols ())
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43 return 0;
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44
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45 return mx_inline_equal (length (), data (), a.data ());
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46 }
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47
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48 bool
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49 FloatDiagMatrix::operator != (const FloatDiagMatrix& a) const
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50 {
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51 return !(*this == a);
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52 }
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53
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54 FloatDiagMatrix&
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55 FloatDiagMatrix::fill (float val)
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56 {
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57 for (octave_idx_type i = 0; i < length (); i++)
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58 elem (i, i) = val;
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59 return *this;
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60 }
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61
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62 FloatDiagMatrix&
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63 FloatDiagMatrix::fill (float val, octave_idx_type beg, octave_idx_type end)
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64 {
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65 if (beg < 0 || end >= length () || end < beg)
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66 {
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67 (*current_liboctave_error_handler) ("range error for fill");
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68 return *this;
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69 }
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70
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71 for (octave_idx_type i = beg; i <= end; i++)
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72 elem (i, i) = val;
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73
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74 return *this;
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75 }
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76
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77 FloatDiagMatrix&
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78 FloatDiagMatrix::fill (const FloatColumnVector& a)
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79 {
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80 octave_idx_type len = length ();
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81 if (a.length () != len)
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82 {
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83 (*current_liboctave_error_handler) ("range error for fill");
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84 return *this;
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85 }
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86
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87 for (octave_idx_type i = 0; i < len; i++)
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88 elem (i, i) = a.elem (i);
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89
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90 return *this;
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91 }
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92
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93 FloatDiagMatrix&
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94 FloatDiagMatrix::fill (const FloatRowVector& a)
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95 {
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96 octave_idx_type len = length ();
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97 if (a.length () != len)
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98 {
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99 (*current_liboctave_error_handler) ("range error for fill");
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100 return *this;
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101 }
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102
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103 for (octave_idx_type i = 0; i < len; i++)
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104 elem (i, i) = a.elem (i);
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105
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106 return *this;
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107 }
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108
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109 FloatDiagMatrix&
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110 FloatDiagMatrix::fill (const FloatColumnVector& a, octave_idx_type beg)
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111 {
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112 octave_idx_type a_len = a.length ();
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113 if (beg < 0 || beg + a_len >= length ())
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114 {
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115 (*current_liboctave_error_handler) ("range error for fill");
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116 return *this;
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117 }
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118
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119 for (octave_idx_type i = 0; i < a_len; i++)
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120 elem (i+beg, i+beg) = a.elem (i);
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121
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122 return *this;
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123 }
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124
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125 FloatDiagMatrix&
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126 FloatDiagMatrix::fill (const FloatRowVector& a, octave_idx_type beg)
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127 {
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128 octave_idx_type a_len = a.length ();
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129 if (beg < 0 || beg + a_len >= length ())
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130 {
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131 (*current_liboctave_error_handler) ("range error for fill");
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132 return *this;
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133 }
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134
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135 for (octave_idx_type i = 0; i < a_len; i++)
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136 elem (i+beg, i+beg) = a.elem (i);
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137
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138 return *this;
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139 }
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140
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141 FloatDiagMatrix
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142 FloatDiagMatrix::abs (void) const
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143 {
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144 return FloatDiagMatrix (extract_diag ().abs (), rows (), columns ());
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145 }
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146
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147 FloatDiagMatrix
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148 real (const FloatComplexDiagMatrix& a)
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149 {
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150 return FloatDiagMatrix (real (a.extract_diag ()), a.rows (), a.columns ());
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151 }
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152
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153 FloatDiagMatrix
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154 imag (const FloatComplexDiagMatrix& a)
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155 {
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156 return FloatDiagMatrix (imag (a.extract_diag ()), a.rows (), a.columns ());
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157 }
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158
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159 FloatMatrix
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49a5a4be04a1 maint: Use GNU style coding conventions for code in liboctave/
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diff changeset
160 FloatDiagMatrix::extract (octave_idx_type r1, octave_idx_type c1,
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161 octave_idx_type r2, octave_idx_type c2) const
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162 {
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parents: 15448
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163 if (r1 > r2) { std::swap (r1, r2); }
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diff changeset
164 if (c1 > c2) { std::swap (c1, c2); }
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165
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166 octave_idx_type new_r = r2 - r1 + 1;
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167 octave_idx_type new_c = c2 - c1 + 1;
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168
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169 FloatMatrix result (new_r, new_c);
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170
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171 for (octave_idx_type j = 0; j < new_c; j++)
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172 for (octave_idx_type i = 0; i < new_r; i++)
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173 result.elem (i, j) = elem (r1+i, c1+j);
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174
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175 return result;
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176 }
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177
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178 // extract row or column i.
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179
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180 FloatRowVector
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181 FloatDiagMatrix::row (octave_idx_type i) const
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182 {
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183 octave_idx_type r = rows ();
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184 octave_idx_type c = cols ();
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185 if (i < 0 || i >= r)
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186 {
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187 (*current_liboctave_error_handler) ("invalid row selection");
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188 return FloatRowVector ();
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189 }
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190
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191 FloatRowVector retval (c, 0.0);
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192 if (r <= c || (r > c && i < c))
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193 retval.elem (i) = elem (i, i);
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194
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195 return retval;
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196 }
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197
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198 FloatRowVector
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199 FloatDiagMatrix::row (char *s) const
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200 {
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201 if (! s)
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202 {
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203 (*current_liboctave_error_handler) ("invalid row selection");
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204 return FloatRowVector ();
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205 }
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206
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207 char c = *s;
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208 if (c == 'f' || c == 'F')
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209 return row (static_cast<octave_idx_type>(0));
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210 else if (c == 'l' || c == 'L')
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211 return row (rows () - 1);
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212 else
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213 {
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214 (*current_liboctave_error_handler) ("invalid row selection");
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215 return FloatRowVector ();
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216 }
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217 }
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218
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219 FloatColumnVector
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220 FloatDiagMatrix::column (octave_idx_type i) const
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221 {
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222 octave_idx_type r = rows ();
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223 octave_idx_type c = cols ();
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224 if (i < 0 || i >= c)
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225 {
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226 (*current_liboctave_error_handler) ("invalid column selection");
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227 return FloatColumnVector ();
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228 }
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229
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230 FloatColumnVector retval (r, 0.0);
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231 if (r >= c || (r < c && i < r))
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232 retval.elem (i) = elem (i, i);
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233
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234 return retval;
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235 }
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236
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237 FloatColumnVector
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238 FloatDiagMatrix::column (char *s) const
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239 {
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240 if (! s)
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241 {
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242 (*current_liboctave_error_handler) ("invalid column selection");
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243 return FloatColumnVector ();
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244 }
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245
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246 char c = *s;
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247 if (c == 'f' || c == 'F')
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248 return column (static_cast<octave_idx_type>(0));
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249 else if (c == 'l' || c == 'L')
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diff changeset
250 return column (cols () - 1);
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251 else
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diff changeset
252 {
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253 (*current_liboctave_error_handler) ("invalid column selection");
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254 return FloatColumnVector ();
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255 }
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256 }
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257
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diff changeset
258 FloatDiagMatrix
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parents:
diff changeset
259 FloatDiagMatrix::inverse (void) const
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parents:
diff changeset
260 {
8811
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parents: 8380
diff changeset
261 octave_idx_type info;
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262 return inverse (info);
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263 }
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264
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265 FloatDiagMatrix
8811
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parents: 8380
diff changeset
266 FloatDiagMatrix::inverse (octave_idx_type &info) const
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267 {
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268 octave_idx_type r = rows ();
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269 octave_idx_type c = cols ();
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270 octave_idx_type len = length ();
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diff changeset
271 if (r != c)
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parents:
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272 {
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273 (*current_liboctave_error_handler) ("inverse requires square matrix");
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parents:
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274 return FloatDiagMatrix ();
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275 }
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parents:
diff changeset
276
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parents:
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277 FloatDiagMatrix retval (r, c);
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278
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diff changeset
279 info = 0;
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280 for (octave_idx_type i = 0; i < len; i++)
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281 {
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282 if (elem (i, i) == 0.0)
10314
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
283 {
07ebe522dac2 untabify liboctave C++ sources
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diff changeset
284 info = -1;
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diff changeset
285 return *this;
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diff changeset
286 }
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287 else
10314
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diff changeset
288 retval.elem (i, i) = 1.0 / elem (i, i);
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289 }
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290
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291 return retval;
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292 }
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293
8840
c690e3772583 support diagonal matrices in pinv
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294 FloatDiagMatrix
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diff changeset
295 FloatDiagMatrix::pseudo_inverse (void) const
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296 {
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297 octave_idx_type r = rows ();
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298 octave_idx_type c = cols ();
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299 octave_idx_type len = length ();
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300
c690e3772583 support diagonal matrices in pinv
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diff changeset
301 FloatDiagMatrix retval (c, r);
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diff changeset
302
c690e3772583 support diagonal matrices in pinv
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diff changeset
303 for (octave_idx_type i = 0; i < len; i++)
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diff changeset
304 {
c690e3772583 support diagonal matrices in pinv
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305 if (elem (i, i) != 0.0f)
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diff changeset
306 retval.elem (i, i) = 1.0f / elem (i, i);
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307 else
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diff changeset
308 retval.elem (i, i) = 0.0f;
c690e3772583 support diagonal matrices in pinv
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diff changeset
309 }
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diff changeset
310
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diff changeset
311 return retval;
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diff changeset
312 }
c690e3772583 support diagonal matrices in pinv
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diff changeset
313
7789
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314 // diagonal matrix by diagonal matrix -> diagonal matrix operations
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diff changeset
315
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diff changeset
316 // diagonal matrix by diagonal matrix -> diagonal matrix operations
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diff changeset
317
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diff changeset
318 FloatDiagMatrix
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parents:
diff changeset
319 operator * (const FloatDiagMatrix& a, const FloatDiagMatrix& b)
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diff changeset
320 {
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diff changeset
321 octave_idx_type a_nr = a.rows ();
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diff changeset
322 octave_idx_type a_nc = a.cols ();
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323
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324 octave_idx_type b_nr = b.rows ();
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325 octave_idx_type b_nc = b.cols ();
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326
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327 if (a_nc != b_nr)
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328 gripe_nonconformant ("operator *", a_nr, a_nc, b_nr, b_nc);
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329
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330 FloatDiagMatrix c (a_nr, b_nc);
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331
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332 octave_idx_type len = c.length ();
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333 octave_idx_type lenm = len < a_nc ? len : a_nc;
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334
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335 for (octave_idx_type i = 0; i < lenm; i++)
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336 c.dgxelem (i) = a.dgelem (i) * b.dgelem (i);
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337 for (octave_idx_type i = lenm; i < len; i++)
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338 c.dgxelem (i) = 0.0f;
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339
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340 return c;
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341 }
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342
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343 // other operations
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344
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345 FloatDET
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346 FloatDiagMatrix::determinant (void) const
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347 {
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348 FloatDET det (1.0f);
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349 if (rows () != cols ())
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350 {
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351 (*current_liboctave_error_handler) ("determinant requires square matrix");
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352 det = 0.0f;
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353 }
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354 else
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355 {
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356 octave_idx_type len = length ();
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357 for (octave_idx_type i = 0; i < len; i++)
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358 det *= elem (i, i);
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359 }
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360
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361 return det;
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362 }
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363
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364 float
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365 FloatDiagMatrix::rcond (void) const
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366 {
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367 FloatColumnVector av = extract_diag (0).map<float> (fabsf);
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368 float amx = av.max ();
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369 float amn = av.min ();
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370 return amx == 0 ? 0.0f : amn / amx;
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371 }
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372
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373 std::ostream&
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374 operator << (std::ostream& os, const FloatDiagMatrix& a)
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375 {
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376 // int field_width = os.precision () + 7;
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377
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378 for (octave_idx_type i = 0; i < a.rows (); i++)
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379 {
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380 for (octave_idx_type j = 0; j < a.cols (); j++)
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381 {
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382 if (i == j)
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383 os << " " /* setw (field_width) */ << a.elem (i, i);
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384 else
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385 os << " " /* setw (field_width) */ << 0.0;
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386 }
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387 os << "\n";
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388 }
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389 return os;
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390 }