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annotate liboctave/array/fRowVector.cc @ 23084:ef4d915df748

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Mon, 23 Jan 2017 14:27:48 -0500
parents cd33c785e80e e9a0469dedd9
children 092078913d54
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1 // RowVector manipulations.
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2 /*
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3
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4 Copyright (C) 1994-2016 John W. Eaton
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3 of the License, or
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11 (at your option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but
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14 WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #if defined (HAVE_CONFIG_H)
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25 # include "config.h"
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26 #endif
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27
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28 #include <iostream>
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29
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30 #include "Array-util.h"
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31 #include "functor.h"
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32 #include "lo-blas-proto.h"
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33 #include "lo-error.h"
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34 #include "mx-base.h"
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35 #include "mx-inlines.cc"
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36 #include "oct-cmplx.h"
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37
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38 // Row Vector class.
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39
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40 bool
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41 FloatRowVector::operator == (const FloatRowVector& a) const
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42 {
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43 octave_idx_type len = numel ();
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44 if (len != a.numel ())
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45 return 0;
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46 return mx_inline_equal (len, data (), a.data ());
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47 }
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48
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49 bool
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50 FloatRowVector::operator != (const FloatRowVector& a) const
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51 {
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52 return !(*this == a);
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53 }
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54
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55 FloatRowVector&
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56 FloatRowVector::insert (const FloatRowVector& a, octave_idx_type c)
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57 {
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58 octave_idx_type a_len = a.numel ();
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59
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60 if (c < 0 || c + a_len > numel ())
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61 (*current_liboctave_error_handler) ("range error for insert");
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62
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63 if (a_len > 0)
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64 {
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65 make_unique ();
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66
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67 for (octave_idx_type i = 0; i < a_len; i++)
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68 xelem (c+i) = a.elem (i);
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69 }
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70
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71 return *this;
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72 }
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73
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74 FloatRowVector&
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75 FloatRowVector::fill (float val)
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76 {
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77 octave_idx_type len = numel ();
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78
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79 if (len > 0)
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80 {
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81 make_unique ();
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82
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83 for (octave_idx_type i = 0; i < len; i++)
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84 xelem (i) = val;
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85 }
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86
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87 return *this;
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88 }
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89
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90 FloatRowVector&
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91 FloatRowVector::fill (float val, octave_idx_type c1, octave_idx_type c2)
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92 {
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93 octave_idx_type len = numel ();
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94
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95 if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len)
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96 (*current_liboctave_error_handler) ("range error for fill");
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97
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98 if (c1 > c2) { std::swap (c1, c2); }
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99
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100 if (c2 >= c1)
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101 {
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102 make_unique ();
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103
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104 for (octave_idx_type i = c1; i <= c2; i++)
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105 xelem (i) = val;
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106 }
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107
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108 return *this;
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109 }
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110
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111 FloatRowVector
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112 FloatRowVector::append (const FloatRowVector& a) const
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113 {
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114 octave_idx_type len = numel ();
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115 octave_idx_type nc_insert = len;
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116 FloatRowVector retval (len + a.numel ());
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117 retval.insert (*this, 0);
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118 retval.insert (a, nc_insert);
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119 return retval;
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120 }
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121
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122 FloatColumnVector
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123 FloatRowVector::transpose (void) const
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124 {
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125 return MArray<float>::transpose ();
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126 }
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127
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128 FloatRowVector
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129 real (const FloatComplexRowVector& a)
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130 {
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131 return do_mx_unary_op<float, FloatComplex> (a, mx_inline_real);
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132 }
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133
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134 FloatRowVector
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135 imag (const FloatComplexRowVector& a)
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136 {
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137 return do_mx_unary_op<float, FloatComplex> (a, mx_inline_imag);
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138 }
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139
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140 FloatRowVector
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141 FloatRowVector::extract (octave_idx_type c1, octave_idx_type c2) const
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142 {
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143 if (c1 > c2) { std::swap (c1, c2); }
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144
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145 octave_idx_type new_c = c2 - c1 + 1;
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146
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147 FloatRowVector result (new_c);
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148
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149 for (octave_idx_type i = 0; i < new_c; i++)
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150 result.xelem (i) = elem (c1+i);
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151
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152 return result;
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153 }
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154
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155 FloatRowVector
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156 FloatRowVector::extract_n (octave_idx_type r1, octave_idx_type n) const
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157 {
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158 FloatRowVector result (n);
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159
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160 for (octave_idx_type i = 0; i < n; i++)
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161 result.xelem (i) = elem (r1+i);
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162
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163 return result;
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164 }
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165
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166 // row vector by matrix -> row vector
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167
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168 FloatRowVector
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169 operator * (const FloatRowVector& v, const FloatMatrix& a)
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170 {
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171 FloatRowVector retval;
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172
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173 F77_INT len = octave::to_f77_int (v.numel ());
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174
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175 F77_INT a_nr = octave::to_f77_int (a.rows ());
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176 F77_INT a_nc = octave::to_f77_int (a.cols ());
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177
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178 if (a_nr != len)
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179 octave::err_nonconformant ("operator *", 1, len, a_nr, a_nc);
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180
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181 if (len == 0)
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182 retval.resize (a_nc, 0.0);
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183 else
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184 {
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185 // Transpose A to form A'*x == (x'*A)'
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186
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187 F77_INT ld = a_nr;
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188
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189 retval.resize (a_nc);
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190 float *y = retval.fortran_vec ();
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191
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192 F77_XFCN (sgemv, SGEMV, (F77_CONST_CHAR_ARG2 ("T", 1),
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193 a_nr, a_nc, 1.0, a.data (),
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194 ld, v.data (), 1, 0.0, y, 1
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195 F77_CHAR_ARG_LEN (1)));
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196 }
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197
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198 return retval;
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199 }
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200
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201 // other operations
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202
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203 float
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204 FloatRowVector::min (void) const
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205 {
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parents: 19697
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206 octave_idx_type len = numel ();
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207 if (len == 0)
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208 return 0;
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209
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210 float res = elem (0);
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211
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212 for (octave_idx_type i = 1; i < len; i++)
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213 if (elem (i) < res)
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214 res = elem (i);
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215
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216 return res;
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217 }
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218
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219 float
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220 FloatRowVector::max (void) const
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221 {
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222 octave_idx_type len = numel ();
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223 if (len == 0)
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224 return 0;
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225
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226 float res = elem (0);
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227
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228 for (octave_idx_type i = 1; i < len; i++)
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229 if (elem (i) > res)
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230 res = elem (i);
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231
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232 return res;
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233 }
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234
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235 std::ostream&
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236 operator << (std::ostream& os, const FloatRowVector& a)
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237 {
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238 // int field_width = os.precision () + 7;
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239
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240 for (octave_idx_type i = 0; i < a.numel (); i++)
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241 os << " " /* setw (field_width) */ << a.elem (i);
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242 return os;
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243 }
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244
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245 std::istream&
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246 operator >> (std::istream& is, FloatRowVector& a)
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247 {
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248 octave_idx_type len = a.numel ();
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249
8999
dc07bc4157b8 allow empty matrices in stream input operators
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250 if (len > 0)
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251 {
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252 float tmp;
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253 for (octave_idx_type i = 0; i < len; i++)
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254 {
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255 is >> tmp;
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256 if (is)
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257 a.elem (i) = tmp;
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258 else
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259 break;
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260 }
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261 }
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262 return is;
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263 }
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264
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265 // other operations
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266
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267 FloatRowVector
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268 linspace (float x1, float x2, octave_idx_type n)
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269 {
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270 NoAlias<FloatRowVector> retval;
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271
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272 if (n < 1)
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273 return retval;
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274 else
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275 retval.clear (n);
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276
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277 retval(0) = x1;
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278
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279 float delta = (x2 - x1) / (n - 1);
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280 for (octave_idx_type i = 1; i < n-1; i++)
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281 retval(i) = x1 + i*delta;
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282
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283 retval(n-1) = x2;
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284
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285 return retval;
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286 }
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287
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288 // row vector by column vector -> scalar
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289
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290 float
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291 operator * (const FloatRowVector& v, const FloatColumnVector& a)
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292 {
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293 float retval = 0.0;
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294
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295 F77_INT len = octave::to_f77_int (v.numel ());
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296
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297 F77_INT a_len = octave::to_f77_int (a.numel ());
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298
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299 if (len != a_len)
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300 octave::err_nonconformant ("operator *", len, a_len);
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301
499b851fbfae Replace pattern if/err_XXX/else/code with if/err_XXX/ code.
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302 if (len != 0)
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303 F77_FUNC (xsdot, XSDOT) (len, v.data (), 1, a.data (), 1, retval);
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304
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305 return retval;
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306 }
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307
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308 FloatComplex
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309 operator * (const FloatRowVector& v, const FloatComplexColumnVector& a)
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310 {
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311 FloatComplexRowVector tmp (v);
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312 return tmp * a;
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313 }