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annotate liboctave/fDiagMatrix.cc @ 9550:3d6a9aea2aea

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refactor binary & bool ops in liboctave
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 19 Aug 2009 22:55:15 +0200
parents eb63fbe60fab
children a9b37bae1802
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1 // FloatDiagMatrix manipulations.
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2 /*
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3
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4 Copyright (C) 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003, 2004,
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5 2005, 2007, 2008, 2009 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 "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 FloatDiagMatrix retval (rows (), cols ());
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145 for (octave_idx_type i = 0; i < rows (); i++)
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146 retval(i, i) = std::abs (elem (i, i));
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147 return retval;
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148 }
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149
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150 FloatDiagMatrix
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151 real (const FloatComplexDiagMatrix& a)
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152 {
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153 FloatDiagMatrix retval;
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154 octave_idx_type a_len = a.length ();
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155 if (a_len > 0)
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156 retval = FloatDiagMatrix (mx_inline_real_dup (a.data (), a_len), a.rows (),
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157 a.cols ());
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158 return retval;
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159 }
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160
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161 FloatDiagMatrix
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162 imag (const FloatComplexDiagMatrix& a)
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163 {
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164 FloatDiagMatrix retval;
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165 octave_idx_type a_len = a.length ();
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166 if (a_len > 0)
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167 retval = FloatDiagMatrix (mx_inline_imag_dup (a.data (), a_len), a.rows (),
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168 a.cols ());
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169 return retval;
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170 }
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171
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172 FloatMatrix
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173 FloatDiagMatrix::extract (octave_idx_type r1, octave_idx_type c1, octave_idx_type r2, octave_idx_type c2) const
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174 {
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175 if (r1 > r2) { octave_idx_type tmp = r1; r1 = r2; r2 = tmp; }
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176 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; }
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177
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178 octave_idx_type new_r = r2 - r1 + 1;
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179 octave_idx_type new_c = c2 - c1 + 1;
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180
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181 FloatMatrix result (new_r, new_c);
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diff changeset
182
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183 for (octave_idx_type j = 0; j < new_c; j++)
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184 for (octave_idx_type i = 0; i < new_r; i++)
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185 result.elem (i, j) = elem (r1+i, c1+j);
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186
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187 return result;
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188 }
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189
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190 // extract row or column i.
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191
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192 FloatRowVector
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193 FloatDiagMatrix::row (octave_idx_type i) const
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194 {
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195 octave_idx_type r = rows ();
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196 octave_idx_type c = cols ();
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197 if (i < 0 || i >= r)
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198 {
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199 (*current_liboctave_error_handler) ("invalid row selection");
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200 return FloatRowVector ();
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201 }
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202
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203 FloatRowVector retval (c, 0.0);
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204 if (r <= c || (r > c && i < c))
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205 retval.elem (i) = elem (i, i);
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206
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207 return retval;
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208 }
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209
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210 FloatRowVector
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211 FloatDiagMatrix::row (char *s) const
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212 {
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213 if (! s)
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214 {
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215 (*current_liboctave_error_handler) ("invalid row selection");
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216 return FloatRowVector ();
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217 }
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218
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219 char c = *s;
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220 if (c == 'f' || c == 'F')
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221 return row (static_cast<octave_idx_type>(0));
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222 else if (c == 'l' || c == 'L')
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223 return row (rows () - 1);
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224 else
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225 {
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226 (*current_liboctave_error_handler) ("invalid row selection");
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227 return FloatRowVector ();
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228 }
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229 }
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230
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231 FloatColumnVector
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232 FloatDiagMatrix::column (octave_idx_type i) const
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233 {
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234 octave_idx_type r = rows ();
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235 octave_idx_type c = cols ();
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236 if (i < 0 || i >= c)
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237 {
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238 (*current_liboctave_error_handler) ("invalid column selection");
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239 return FloatColumnVector ();
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240 }
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241
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242 FloatColumnVector retval (r, 0.0);
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243 if (r >= c || (r < c && i < r))
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244 retval.elem (i) = elem (i, i);
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245
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246 return retval;
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247 }
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248
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249 FloatColumnVector
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250 FloatDiagMatrix::column (char *s) const
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251 {
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252 if (! s)
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253 {
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254 (*current_liboctave_error_handler) ("invalid column selection");
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255 return FloatColumnVector ();
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256 }
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257
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258 char c = *s;
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259 if (c == 'f' || c == 'F')
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260 return column (static_cast<octave_idx_type>(0));
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261 else if (c == 'l' || c == 'L')
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262 return column (cols () - 1);
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parents:
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263 else
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parents:
diff changeset
264 {
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diff changeset
265 (*current_liboctave_error_handler) ("invalid column selection");
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266 return FloatColumnVector ();
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parents:
diff changeset
267 }
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268 }
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269
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270 FloatDiagMatrix
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271 FloatDiagMatrix::inverse (void) const
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272 {
8811
20dfb885f877 int -> octave_idx fixes
John W. Eaton <jwe@octave.org>
parents: 8380
diff changeset
273 octave_idx_type info;
7789
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274 return inverse (info);
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275 }
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276
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277 FloatDiagMatrix
8811
20dfb885f877 int -> octave_idx fixes
John W. Eaton <jwe@octave.org>
parents: 8380
diff changeset
278 FloatDiagMatrix::inverse (octave_idx_type &info) const
7789
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diff changeset
279 {
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280 octave_idx_type r = rows ();
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281 octave_idx_type c = cols ();
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282 octave_idx_type len = length ();
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diff changeset
283 if (r != c)
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diff changeset
284 {
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285 (*current_liboctave_error_handler) ("inverse requires square matrix");
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diff changeset
286 return FloatDiagMatrix ();
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parents:
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287 }
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diff changeset
288
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289 FloatDiagMatrix retval (r, c);
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290
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diff changeset
291 info = 0;
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292 for (octave_idx_type i = 0; i < len; i++)
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diff changeset
293 {
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diff changeset
294 if (elem (i, i) == 0.0)
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diff changeset
295 {
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diff changeset
296 info = -1;
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diff changeset
297 return *this;
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parents:
diff changeset
298 }
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diff changeset
299 else
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parents:
diff changeset
300 retval.elem (i, i) = 1.0 / elem (i, i);
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parents:
diff changeset
301 }
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diff changeset
302
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diff changeset
303 return retval;
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parents:
diff changeset
304 }
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parents:
diff changeset
305
8840
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
306 FloatDiagMatrix
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
307 FloatDiagMatrix::pseudo_inverse (void) const
c690e3772583 support diagonal matrices in pinv
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parents: 8811
diff changeset
308 {
c690e3772583 support diagonal matrices in pinv
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parents: 8811
diff changeset
309 octave_idx_type r = rows ();
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parents: 8811
diff changeset
310 octave_idx_type c = cols ();
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parents: 8811
diff changeset
311 octave_idx_type len = length ();
c690e3772583 support diagonal matrices in pinv
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parents: 8811
diff changeset
312
c690e3772583 support diagonal matrices in pinv
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parents: 8811
diff changeset
313 FloatDiagMatrix retval (c, r);
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Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
314
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
315 for (octave_idx_type i = 0; i < len; i++)
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parents: 8811
diff changeset
316 {
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
317 if (elem (i, i) != 0.0f)
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
318 retval.elem (i, i) = 1.0f / elem (i, i);
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
319 else
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
320 retval.elem (i, i) = 0.0f;
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
321 }
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
322
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
323 return retval;
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
324 }
c690e3772583 support diagonal matrices in pinv
Jaroslav Hajek <highegg@gmail.com>
parents: 8811
diff changeset
325
7789
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parents:
diff changeset
326 // diagonal matrix by diagonal matrix -> diagonal matrix operations
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parents:
diff changeset
327
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parents:
diff changeset
328 // diagonal matrix by diagonal matrix -> diagonal matrix operations
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parents:
diff changeset
329
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parents:
diff changeset
330 FloatDiagMatrix
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parents:
diff changeset
331 operator * (const FloatDiagMatrix& a, const FloatDiagMatrix& b)
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parents:
diff changeset
332 {
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parents:
diff changeset
333 octave_idx_type a_nr = a.rows ();
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parents:
diff changeset
334 octave_idx_type a_nc = a.cols ();
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parents:
diff changeset
335
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parents:
diff changeset
336 octave_idx_type b_nr = b.rows ();
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parents:
diff changeset
337 octave_idx_type b_nc = b.cols ();
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parents:
diff changeset
338
82be108cc558 First attempt at single precision tyeps
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parents:
diff changeset
339 if (a_nc != b_nr)
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parents:
diff changeset
340 {
82be108cc558 First attempt at single precision tyeps
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341 gripe_nonconformant ("operaotr *", a_nr, a_nc, b_nr, b_nc);
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342 return FloatDiagMatrix ();
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343 }
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344
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345 if (a_nr == 0 || a_nc == 0 || b_nc == 0)
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346 return FloatDiagMatrix (a_nr, a_nc, 0.0);
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347
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348 FloatDiagMatrix c (a_nr, b_nc);
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349
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350 octave_idx_type len = a_nr < b_nc ? a_nr : b_nc;
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351
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352 for (octave_idx_type i = 0; i < len; i++)
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353 {
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354 float a_element = a.elem (i, i);
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355 float b_element = b.elem (i, i);
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356
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357 c.elem (i, i) = a_element * b_element;
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358 }
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359
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360 return c;
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361 }
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362
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363 // other operations
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364
8371
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365 FloatDET
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366 FloatDiagMatrix::determinant (void) const
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367 {
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368 FloatDET det (1.0f);
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369 if (rows () != cols ())
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370 {
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371 (*current_liboctave_error_handler) ("determinant requires square matrix");
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372 det = 0.0f;
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373 }
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374 else
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375 {
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376 octave_idx_type len = length ();
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377 for (octave_idx_type i = 0; i < len; i++)
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378 det *= elem (i, i);
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379 }
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380
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381 return det;
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382 }
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383
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384 float
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385 FloatDiagMatrix::rcond (void) const
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386 {
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387 FloatColumnVector av = diag (0).map (fabsf);
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388 float amx = av.max (), amn = av.min ();
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389 return amx == 0 ? 0.0f : amn / amx;
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390 }
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391
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392 std::ostream&
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393 operator << (std::ostream& os, const FloatDiagMatrix& a)
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394 {
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395 // int field_width = os.precision () + 7;
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396
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397 for (octave_idx_type i = 0; i < a.rows (); i++)
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398 {
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399 for (octave_idx_type j = 0; j < a.cols (); j++)
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400 {
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401 if (i == j)
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402 os << " " /* setw (field_width) */ << a.elem (i, i);
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403 else
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404 os << " " /* setw (field_width) */ << 0.0;
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405 }
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406 os << "\n";
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407 }
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408 return os;
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409 }
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410
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411 /*
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412 ;;; Local Variables: ***
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413 ;;; mode: C++ ***
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414 ;;; End: ***
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415 */