Mercurial > octave
annotate libinterp/corefcn/dot.cc @ 20819:f428cbe7576f
eliminate unnecessary uses of nargin
* __dsearchn__.cc, betainc.cc, bsxfun.cc, data.cc, debug.cc, det.cc,
dot.cc, error.cc, file-io.cc, givens.cc, graphics.cc, hess.cc,
hex2num.cc, input.cc, inv.cc, mgorth.cc, ordschur.cc, pr-output.cc,
profiler.cc, rcond.cc, regexp.cc, sqrtm.cc, sub2ind.cc, sylvester.cc,
syscalls.cc, sysdep.cc, tsearch.cc, urlwrite.cc, utils.cc,
variables.cc:
Don't use nargin variable unless it is used more than once.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 07 Dec 2015 13:54:01 -0500 |
parents | 8bb38ba1bad6 |
children | 1142cf6abc0d |
rev | line source |
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1 /* |
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2 |
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3 Copyright (C) 2009-2015 VZLU Prague |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include "f77-fcn.h" |
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28 #include "mx-base.h" |
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29 #include "error.h" |
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30 #include "defun.h" |
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31 #include "parse.h" |
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32 |
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33 extern "C" |
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34 { |
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35 F77_RET_T |
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36 F77_FUNC (ddot3, DDOT3) (const octave_idx_type&, const octave_idx_type&, |
11518 | 37 const octave_idx_type&, const double*, |
38 const double*, double*); | |
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39 |
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40 F77_RET_T |
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41 F77_FUNC (sdot3, SDOT3) (const octave_idx_type&, const octave_idx_type&, |
11518 | 42 const octave_idx_type&, const float*, |
43 const float*, float*); | |
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44 |
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45 F77_RET_T |
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46 F77_FUNC (zdotc3, ZDOTC3) (const octave_idx_type&, const octave_idx_type&, |
11518 | 47 const octave_idx_type&, const Complex*, |
48 const Complex*, Complex*); | |
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49 |
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50 F77_RET_T |
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51 F77_FUNC (cdotc3, CDOTC3) (const octave_idx_type&, const octave_idx_type&, |
11518 | 52 const octave_idx_type&, const FloatComplex*, |
53 const FloatComplex*, FloatComplex*); | |
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54 |
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55 F77_RET_T |
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56 F77_FUNC (dmatm3, DMATM3) (const octave_idx_type&, const octave_idx_type&, |
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57 const octave_idx_type&, const octave_idx_type&, |
11518 | 58 const double*, const double*, double*); |
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59 |
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60 F77_RET_T |
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61 F77_FUNC (smatm3, SMATM3) (const octave_idx_type&, const octave_idx_type&, |
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62 const octave_idx_type&, const octave_idx_type&, |
11518 | 63 const float*, const float*, float*); |
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64 |
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65 F77_RET_T |
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66 F77_FUNC (zmatm3, ZMATM3) (const octave_idx_type&, const octave_idx_type&, |
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67 const octave_idx_type&, const octave_idx_type&, |
11518 | 68 const Complex*, const Complex*, Complex*); |
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69 |
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70 F77_RET_T |
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71 F77_FUNC (cmatm3, CMATM3) (const octave_idx_type&, const octave_idx_type&, |
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72 const octave_idx_type&, const octave_idx_type&, |
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74 FloatComplex*); | |
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75 } |
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76 |
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77 static void |
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78 get_red_dims (const dim_vector& x, const dim_vector& y, int dim, |
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79 dim_vector& z, octave_idx_type& m, octave_idx_type& n, |
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80 octave_idx_type& k) |
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81 { |
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82 int nd = x.length (); |
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83 assert (nd == y.length ()); |
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84 z = dim_vector::alloc (nd); |
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85 m = 1, n = 1, k = 1; |
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86 for (int i = 0; i < nd; i++) |
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87 { |
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88 if (i < dim) |
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89 { |
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90 z(i) = x(i); |
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91 m *= x(i); |
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92 } |
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93 else if (i > dim) |
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94 { |
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95 z(i) = x(i); |
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96 n *= x(i); |
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97 } |
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98 else |
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99 { |
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100 k = x(i); |
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101 z(i) = 1; |
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102 } |
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103 } |
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104 } |
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105 |
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106 DEFUN (dot, args, , |
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107 "-*- texinfo -*-\n\ |
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108 @deftypefn {Built-in Function} {} dot (@var{x}, @var{y}, @var{dim})\n\ |
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109 Compute the dot product of two vectors.\n\ |
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110 \n\ |
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111 If @var{x} and @var{y} are matrices, calculate the dot products along the\n\ |
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112 first non-singleton dimension.\n\ |
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113 \n\ |
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114 If the optional argument @var{dim} is given, calculate the dot products\n\ |
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115 along this dimension.\n\ |
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116 \n\ |
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117 This is equivalent to\n\ |
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118 @code{sum (conj (@var{X}) .* @var{Y}, @var{dim})},\n\ |
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119 but avoids forming a temporary array and is faster. When @var{X} and\n\ |
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120 @var{Y} are column vectors, the result is equivalent to\n\ |
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121 @code{@var{X}' * @var{Y}}.\n\ |
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122 @seealso{cross, divergence}\n\ |
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123 @end deftypefn") |
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124 { |
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125 octave_value retval; |
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126 int nargin = args.length (); |
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127 |
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128 if (nargin < 2 || nargin > 3) |
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129 print_usage (); |
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130 |
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131 octave_value argx = args(0); |
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132 octave_value argy = args(1); |
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133 |
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134 if (argx.is_numeric_type () && argy.is_numeric_type ()) |
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135 { |
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136 dim_vector dimx = argx.dims (); |
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137 dim_vector dimy = argy.dims (); |
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138 bool match = dimx == dimy; |
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139 if (! match && nargin == 2 |
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140 && dimx.is_vector () && dimy.is_vector ()) |
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141 { |
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142 // Change to column vectors. |
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143 dimx = dimx.redim (1); |
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144 argx = argx.reshape (dimx); |
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145 dimy = dimy.redim (1); |
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146 argy = argy.reshape (dimy); |
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147 match = dimx == dimy; |
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148 } |
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149 |
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150 if (match) |
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151 { |
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152 int dim; |
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153 if (nargin == 2) |
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154 dim = dimx.first_non_singleton (); |
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155 else |
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156 dim = args(2).int_value (true) - 1; |
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157 |
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158 if (dim < 0) |
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159 error ("dot: DIM must be a valid dimension"); |
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160 else |
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161 { |
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162 octave_idx_type m, n, k; |
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163 dim_vector dimz; |
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164 if (argx.is_complex_type () || argy.is_complex_type ()) |
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165 { |
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166 if (argx.is_single_type () || argy.is_single_type ()) |
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167 { |
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168 FloatComplexNDArray x = argx.float_complex_array_value (); |
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169 FloatComplexNDArray y = argy.float_complex_array_value (); |
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170 get_red_dims (dimx, dimy, dim, dimz, m, n, k); |
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171 FloatComplexNDArray z (dimz); |
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172 |
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173 F77_XFCN (cdotc3, CDOTC3, (m, n, k, |
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174 x.data (), y.data (), |
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175 z.fortran_vec ())); |
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176 retval = z; |
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177 } |
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178 else |
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179 { |
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180 ComplexNDArray x = argx.complex_array_value (); |
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181 ComplexNDArray y = argy.complex_array_value (); |
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182 get_red_dims (dimx, dimy, dim, dimz, m, n, k); |
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183 ComplexNDArray z (dimz); |
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184 |
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185 F77_XFCN (zdotc3, ZDOTC3, (m, n, k, |
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186 x.data (), y.data (), |
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187 z.fortran_vec ())); |
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188 retval = z; |
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189 } |
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190 } |
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191 else if (argx.is_float_type () && argy.is_float_type ()) |
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192 { |
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193 if (argx.is_single_type () || argy.is_single_type ()) |
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194 { |
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195 FloatNDArray x = argx.float_array_value (); |
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196 FloatNDArray y = argy.float_array_value (); |
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197 get_red_dims (dimx, dimy, dim, dimz, m, n, k); |
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198 FloatNDArray z (dimz); |
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199 |
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200 F77_XFCN (sdot3, SDOT3, (m, n, k, x.data (), y.data (), |
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201 z.fortran_vec ())); |
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202 retval = z; |
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203 } |
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204 else |
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205 { |
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206 NDArray x = argx.array_value (); |
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207 NDArray y = argy.array_value (); |
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208 get_red_dims (dimx, dimy, dim, dimz, m, n, k); |
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209 NDArray z (dimz); |
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210 |
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211 F77_XFCN (ddot3, DDOT3, (m, n, k, x.data (), y.data (), |
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212 z.fortran_vec ())); |
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213 retval = z; |
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214 } |
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215 } |
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216 else |
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217 { |
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218 // Non-optimized evaluation. |
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|
219 octave_value_list tmp; |
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220 tmp(1) = dim + 1; |
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221 tmp(0) = do_binary_op (octave_value::op_el_mul, argx, argy); |
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222 |
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223 tmp = feval ("sum", tmp, 1); |
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224 if (! tmp.empty ()) |
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225 retval = tmp(0); |
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226 } |
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227 } |
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228 } |
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229 else |
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230 error ("dot: sizes of X and Y must match"); |
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231 |
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232 } |
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233 else |
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234 error ("dot: X and Y must be numeric"); |
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235 |
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236 return retval; |
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237 } |
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238 |
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239 /* |
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240 %!assert (dot ([1, 2], [2, 3]), 8) |
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241 |
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242 %!test |
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243 %! x = [2, 1; 2, 1]; |
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244 %! y = [-0.5, 2; 0.5, -2]; |
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245 %! assert (dot (x, y), [0 0]); |
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246 %! assert (dot (single (x), single (y)), single ([0 0])); |
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247 |
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248 %!test |
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249 %! x = [1+i, 3-i; 1-i, 3-i]; |
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250 %! assert (dot (x, x), [4, 20]); |
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251 %! assert (dot (single (x), single (x)), single ([4, 20])); |
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252 |
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|
253 %!test |
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254 %! x = int8 ([1 2]); |
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255 %! y = int8 ([2 3]); |
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256 %! assert (dot (x, y), 8); |
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257 |
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258 %!test |
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259 %! x = int8 ([1 2; 3 4]); |
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260 %! y = int8 ([5 6; 7 8]); |
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261 %! assert (dot (x, y), [26 44]); |
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262 %! assert (dot (x, y, 2), [17; 53]); |
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263 %! assert (dot (x, y, 3), [5 12; 21 32]); |
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264 |
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265 %% Test input validation |
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266 %!error dot () |
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267 %!error dot (1) |
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268 %!error dot (1,2,3,4) |
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269 %!error <X and Y must be numeric> dot ({1,2}, [3,4]) |
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270 %!error <X and Y must be numeric> dot ([1,2], {3,4}) |
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271 %!error <sizes of X and Y must match> dot ([1 2], [1 2 3]) |
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272 %!error <sizes of X and Y must match> dot ([1 2]', [1 2 3]') |
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273 %!error <sizes of X and Y must match> dot (ones (2,2), ones (2,3)) |
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274 %!error <DIM must be a valid dimension> dot ([1 2], [1 2], 0) |
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275 */ |
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276 |
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277 DEFUN (blkmm, args, , |
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278 "-*- texinfo -*-\n\ |
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279 @deftypefn {Built-in Function} {} blkmm (@var{A}, @var{B})\n\ |
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280 Compute products of matrix blocks.\n\ |
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281 \n\ |
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282 The blocks are given as 2-dimensional subarrays of the arrays @var{A},\n\ |
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283 @var{B}. The size of @var{A} must have the form @code{[m,k,@dots{}]} and\n\ |
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284 size of @var{B} must be @code{[k,n,@dots{}]}. The result is then of size\n\ |
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285 @code{[m,n,@dots{}]} and is computed as follows:\n\ |
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286 \n\ |
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287 @example\n\ |
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288 @group\n\ |
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289 for i = 1:prod (size (@var{A})(3:end))\n\ |
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290 @var{C}(:,:,i) = @var{A}(:,:,i) * @var{B}(:,:,i)\n\ |
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291 endfor\n\ |
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292 @end group\n\ |
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293 @end example\n\ |
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294 @end deftypefn") |
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295 { |
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296 octave_value retval; |
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297 |
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298 if (args.length () != 2) |
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299 print_usage (); |
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300 |
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301 octave_value argx = args(0); |
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302 octave_value argy = args(1); |
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303 |
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304 if (argx.is_numeric_type () && argy.is_numeric_type ()) |
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305 { |
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306 const dim_vector dimx = argx.dims (); |
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307 const dim_vector dimy = argy.dims (); |
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308 int nd = dimx.length (); |
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309 octave_idx_type m = dimx(0); |
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310 octave_idx_type k = dimx(1); |
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311 octave_idx_type n = dimy(1); |
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312 octave_idx_type np = 1; |
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313 bool match = dimy(0) == k && nd == dimy.length (); |
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314 dim_vector dimz = dim_vector::alloc (nd); |
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315 dimz(0) = m; |
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316 dimz(1) = n; |
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317 for (int i = 2; match && i < nd; i++) |
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318 { |
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319 match = match && dimx(i) == dimy(i); |
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320 dimz(i) = dimx(i); |
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321 np *= dimz(i); |
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322 } |
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323 |
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324 if (match) |
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325 { |
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326 if (argx.is_complex_type () || argy.is_complex_type ()) |
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327 { |
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328 if (argx.is_single_type () || argy.is_single_type ()) |
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329 { |
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330 FloatComplexNDArray x = argx.float_complex_array_value (); |
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331 FloatComplexNDArray y = argy.float_complex_array_value (); |
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332 FloatComplexNDArray z (dimz); |
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333 |
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334 F77_XFCN (cmatm3, CMATM3, (m, n, k, np, |
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335 x.data (), y.data (), |
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336 z.fortran_vec ())); |
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337 retval = z; |
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338 } |
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339 else |
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340 { |
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341 ComplexNDArray x = argx.complex_array_value (); |
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342 ComplexNDArray y = argy.complex_array_value (); |
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343 ComplexNDArray z (dimz); |
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344 |
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345 F77_XFCN (zmatm3, ZMATM3, (m, n, k, np, |
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346 x.data (), y.data (), |
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347 z.fortran_vec ())); |
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348 retval = z; |
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349 } |
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350 } |
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351 else |
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352 { |
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353 if (argx.is_single_type () || argy.is_single_type ()) |
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354 { |
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355 FloatNDArray x = argx.float_array_value (); |
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356 FloatNDArray y = argy.float_array_value (); |
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357 FloatNDArray z (dimz); |
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358 |
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359 F77_XFCN (smatm3, SMATM3, (m, n, k, np, |
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360 x.data (), y.data (), |
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361 z.fortran_vec ())); |
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362 retval = z; |
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363 } |
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364 else |
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365 { |
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366 NDArray x = argx.array_value (); |
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367 NDArray y = argy.array_value (); |
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368 NDArray z (dimz); |
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369 |
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370 F77_XFCN (dmatm3, DMATM3, (m, n, k, np, |
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371 x.data (), y.data (), |
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372 z.fortran_vec ())); |
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373 retval = z; |
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374 } |
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375 } |
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376 } |
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377 else |
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378 error ("blkmm: A and B dimensions don't match: (%s) and (%s)", |
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379 dimx.str ().c_str (), dimy.str ().c_str ()); |
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380 |
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381 } |
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382 else |
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383 error ("blkmm: A and B must be numeric"); |
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384 |
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385 return retval; |
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386 } |
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Jordi Gutiérrez Hermoso <jordigh@gmail.com>
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387 |
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388 /* |
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389 %!test |
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390 %! x(:,:,1) = [1 2; 3 4]; |
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391 %! x(:,:,2) = [1 1; 1 1]; |
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392 %! z(:,:,1) = [7 10; 15 22]; |
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393 %! z(:,:,2) = [2 2; 2 2]; |
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394 %! assert (blkmm (x,x), z); |
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395 %! assert (blkmm (single (x), single (x)), single (z)); |
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396 %! assert (blkmm (x, single (x)), single (z)); |
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397 |
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398 %!test |
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399 %! x(:,:,1) = [1 2; 3 4]; |
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400 %! x(:,:,2) = [1i 1i; 1i 1i]; |
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401 %! z(:,:,1) = [7 10; 15 22]; |
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402 %! z(:,:,2) = [-2 -2; -2 -2]; |
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403 %! assert (blkmm (x,x), z); |
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404 %! assert (blkmm (single (x), single (x)), single (z)); |
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405 %! assert (blkmm (x, single (x)), single (z)); |
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406 |
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407 %% Test input validation |
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408 %!error blkmm () |
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409 %!error blkmm (1) |
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410 %!error blkmm (1,2,3) |
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411 %!error <A and B dimensions don't match> blkmm (ones (2,2), ones (3,3)) |
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Rik <rik@octave.org>
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412 %!error <A and B must be numeric> blkmm ({1,2}, [3,4]) |
25ab600d16fd
codesprint: Add %!tests for dot.cc file.
Rik <rik@octave.org>
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413 %!error <A and B must be numeric> blkmm ([3,4], {1,2}) |
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Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents:
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414 */ |
19141
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codesprint: Add %!tests for dot.cc file.
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diff
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415 |