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annotate liboctave/fColVector.cc @ 8924:3c3cbe8f18e0 ss-3-1-54

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bump version info for snapshot
author John W. Eaton <jwe@octave.org>
date Sat, 07 Mar 2009 13:28:03 -0500
parents eb63fbe60fab
children dc07bc4157b8
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1 // ColumnVector 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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eb63fbe60fab update copyright notices
John W. Eaton <jwe@octave.org>
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5 2005, 2007, 2008 John W. Eaton
7789
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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 (sgemv, SGEMV) (F77_CONST_CHAR_ARG_DECL,
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45 const octave_idx_type&, const octave_idx_type&, const float&,
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46 const float*, const octave_idx_type&, const float*,
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47 const octave_idx_type&, const float&, float*,
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48 const octave_idx_type&
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49 F77_CHAR_ARG_LEN_DECL);
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50 }
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51
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52 // Column Vector class.
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53
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54 bool
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55 FloatColumnVector::operator == (const FloatColumnVector& a) const
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56 {
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57 octave_idx_type len = length ();
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58 if (len != a.length ())
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59 return 0;
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60 return mx_inline_equal (data (), a.data (), len);
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61 }
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62
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63 bool
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64 FloatColumnVector::operator != (const FloatColumnVector& a) const
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65 {
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66 return !(*this == a);
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67 }
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68
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69 FloatColumnVector&
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70 FloatColumnVector::insert (const FloatColumnVector& a, octave_idx_type r)
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71 {
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72 octave_idx_type a_len = a.length ();
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73
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74 if (r < 0 || r + a_len > length ())
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75 {
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76 (*current_liboctave_error_handler) ("range error for insert");
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77 return *this;
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78 }
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79
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80 if (a_len > 0)
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81 {
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82 make_unique ();
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83
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84 for (octave_idx_type i = 0; i < a_len; i++)
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85 xelem (r+i) = a.elem (i);
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86 }
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87
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88 return *this;
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89 }
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90
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91 FloatColumnVector&
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92 FloatColumnVector::fill (float val)
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93 {
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94 octave_idx_type len = length ();
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95
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96 if (len > 0)
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97 {
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98 make_unique ();
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99
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100 for (octave_idx_type i = 0; i < len; i++)
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101 xelem (i) = val;
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102 }
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103
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104 return *this;
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105 }
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106
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107 FloatColumnVector&
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108 FloatColumnVector::fill (float val, octave_idx_type r1, octave_idx_type r2)
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109 {
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110 octave_idx_type len = length ();
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111
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112 if (r1 < 0 || r2 < 0 || r1 >= len || r2 >= len)
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113 {
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114 (*current_liboctave_error_handler) ("range error for fill");
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115 return *this;
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116 }
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117
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118 if (r1 > r2) { octave_idx_type tmp = r1; r1 = r2; r2 = tmp; }
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119
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120 if (r2 >= r1)
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121 {
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122 make_unique ();
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123
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124 for (octave_idx_type i = r1; i <= r2; i++)
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125 xelem (i) = val;
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126 }
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127
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128 return *this;
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129 }
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130
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131 FloatColumnVector
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132 FloatColumnVector::stack (const FloatColumnVector& a) const
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133 {
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134 octave_idx_type len = length ();
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135 octave_idx_type nr_insert = len;
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136 FloatColumnVector retval (len + a.length ());
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137 retval.insert (*this, 0);
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138 retval.insert (a, nr_insert);
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139 return retval;
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140 }
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141
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142 FloatRowVector
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143 FloatColumnVector::transpose (void) const
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144 {
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145 return MArray<float>::transpose();
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146 }
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147
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148 FloatColumnVector
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149 real (const FloatComplexColumnVector& a)
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150 {
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151 octave_idx_type a_len = a.length ();
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152 FloatColumnVector retval;
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153 if (a_len > 0)
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154 retval = FloatColumnVector (mx_inline_real_dup (a.data (), a_len), a_len);
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155 return retval;
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156 }
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157
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158 FloatColumnVector
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159 imag (const FloatComplexColumnVector& a)
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160 {
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161 octave_idx_type a_len = a.length ();
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162 FloatColumnVector retval;
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163 if (a_len > 0)
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164 retval = FloatColumnVector (mx_inline_imag_dup (a.data (), a_len), a_len);
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165 return retval;
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166 }
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167
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168 // resize is the destructive equivalent for this one
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169
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170 FloatColumnVector
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171 FloatColumnVector::extract (octave_idx_type r1, octave_idx_type r2) const
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172 {
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173 if (r1 > r2) { octave_idx_type tmp = r1; r1 = r2; r2 = tmp; }
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174
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175 octave_idx_type new_r = r2 - r1 + 1;
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176
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177 FloatColumnVector result (new_r);
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178
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179 for (octave_idx_type i = 0; i < new_r; i++)
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180 result.xelem (i) = elem (r1+i);
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181
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182 return result;
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183 }
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184
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185 FloatColumnVector
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186 FloatColumnVector::extract_n (octave_idx_type r1, octave_idx_type n) const
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187 {
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188 FloatColumnVector result (n);
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189
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190 for (octave_idx_type i = 0; i < n; i++)
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191 result.xelem (i) = elem (r1+i);
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192
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193 return result;
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194 }
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195
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196 // matrix by column vector -> column vector operations
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197
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198 FloatColumnVector
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199 operator * (const FloatMatrix& m, const FloatColumnVector& a)
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200 {
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201 FloatColumnVector retval;
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202
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203 octave_idx_type nr = m.rows ();
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204 octave_idx_type nc = m.cols ();
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205
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206 octave_idx_type a_len = a.length ();
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207
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208 if (nc != a_len)
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209 gripe_nonconformant ("operator *", nr, nc, a_len, 1);
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210 else
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211 {
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212 if (nr == 0 || nc == 0)
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213 retval.resize (nr, 0.0);
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214 else
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215 {
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216 octave_idx_type ld = nr;
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217
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218 retval.resize (nr);
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219 float *y = retval.fortran_vec ();
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220
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221 F77_XFCN (sgemv, SGEMV, (F77_CONST_CHAR_ARG2 ("N", 1),
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222 nr, nc, 1.0, m.data (), ld,
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223 a.data (), 1, 0.0, y, 1
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224 F77_CHAR_ARG_LEN (1)));
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225 }
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226 }
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227
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228 return retval;
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229 }
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230
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231 // diagonal matrix by column vector -> column vector operations
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232
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233 FloatColumnVector
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234 operator * (const FloatDiagMatrix& m, const FloatColumnVector& a)
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235 {
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236 FloatColumnVector retval;
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237
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238 octave_idx_type nr = m.rows ();
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239 octave_idx_type nc = m.cols ();
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240
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241 octave_idx_type a_len = a.length ();
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242
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243 if (nc != a_len)
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244 gripe_nonconformant ("operator *", nr, nc, a_len, 1);
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245 else
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246 {
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247 if (nr == 0 || nc == 0)
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248 retval.resize (nr, 0.0);
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249 else
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250 {
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251 retval.resize (nr);
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252
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253 for (octave_idx_type i = 0; i < a_len; i++)
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254 retval.elem (i) = a.elem (i) * m.elem (i, i);
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255
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256 for (octave_idx_type i = a_len; i < nr; i++)
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257 retval.elem (i) = 0.0;
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258 }
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259 }
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260
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261 return retval;
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262 }
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263
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264 // other operations
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265
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266 FloatColumnVector
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267 FloatColumnVector::map (dmapper fcn) const
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268 {
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269 return MArray<float>::map<float> (func_ptr (fcn));
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270 }
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271
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272 FloatComplexColumnVector
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273 FloatColumnVector::map (cmapper fcn) const
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274 {
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275 return MArray<float>::map<FloatComplex> (func_ptr (fcn));
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276 }
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277
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278 float
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279 FloatColumnVector::min (void) const
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diff changeset
280 {
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281 octave_idx_type len = length ();
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282 if (len == 0)
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283 return 0.0;
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284
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285 float res = elem (0);
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286
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287 for (octave_idx_type i = 1; i < len; i++)
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288 if (elem (i) < res)
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289 res = elem (i);
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290
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291 return res;
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292 }
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293
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diff changeset
294 float
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diff changeset
295 FloatColumnVector::max (void) const
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diff changeset
296 {
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297 octave_idx_type len = length ();
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298 if (len == 0)
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299 return 0.0;
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300
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301 float res = elem (0);
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diff changeset
302
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303 for (octave_idx_type i = 1; i < len; i++)
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diff changeset
304 if (elem (i) > res)
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305 res = elem (i);
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diff changeset
306
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307 return res;
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308 }
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diff changeset
309
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diff changeset
310 std::ostream&
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diff changeset
311 operator << (std::ostream& os, const FloatColumnVector& a)
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diff changeset
312 {
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313 // int field_width = os.precision () + 7;
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314 for (octave_idx_type i = 0; i < a.length (); i++)
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diff changeset
315 os << /* setw (field_width) << */ a.elem (i) << "\n";
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316 return os;
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317 }
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diff changeset
318
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diff changeset
319 std::istream&
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diff changeset
320 operator >> (std::istream& is, FloatColumnVector& a)
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parents:
diff changeset
321 {
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diff changeset
322 octave_idx_type len = a.length();
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diff changeset
323
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diff changeset
324 if (len < 1)
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325 is.clear (std::ios::badbit);
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diff changeset
326 else
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diff changeset
327 {
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diff changeset
328 float tmp;
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diff changeset
329 for (octave_idx_type i = 0; i < len; i++)
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diff changeset
330 {
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diff changeset
331 is >> tmp;
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parents:
diff changeset
332 if (is)
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parents:
diff changeset
333 a.elem (i) = tmp;
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parents:
diff changeset
334 else
82be108cc558 First attempt at single precision tyeps
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parents:
diff changeset
335 break;
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parents:
diff changeset
336 }
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diff changeset
337 }
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diff changeset
338 return is;
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parents:
diff changeset
339 }
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diff changeset
340
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diff changeset
341 /*
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parents:
diff changeset
342 ;;; Local Variables: ***
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parents:
diff changeset
343 ;;; mode: C++ ***
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344 ;;; End: ***
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345 */