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1 // N-D Array manipulations. |
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2 /* |
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3 |
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4 Copyright (C) 1996, 1997 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 the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 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, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 #ifdef HAVE_CONFIG_H |
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29 #include <config.h> |
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30 #endif |
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31 |
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4634
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32 #include <cfloat> |
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4780
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33 #include <vector> |
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34 |
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4588
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35 #include "Array-util.h" |
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4513
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36 #include "dNDArray.h" |
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37 #include "mx-base.h" |
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38 #include "f77-fcn.h" |
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4513
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39 #include "lo-error.h" |
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40 #include "lo-ieee.h" |
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4634
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41 #include "lo-mappers.h" |
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42 |
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4773
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43 #if defined (HAVE_FFTW3) |
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44 #include "oct-fftw.h" |
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45 |
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46 ComplexNDArray |
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47 NDArray::fourier (int dim) const |
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48 { |
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49 dim_vector dv = dims (); |
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50 |
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51 if (dim > dv.length () || dim < 0) |
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52 return ComplexNDArray (); |
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53 |
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54 int stride = 1; |
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55 int n = dv(dim); |
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56 |
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57 for (int i = 0; i < dim; i++) |
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58 stride *= dv(i); |
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59 |
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60 int howmany = numel () / dv (dim); |
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61 howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany)); |
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62 int nloop = (stride == 1 ? 1 : numel () / dv (dim) / stride); |
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63 int dist = (stride == 1 ? n : 1); |
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64 |
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65 const double *in (fortran_vec ()); |
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66 ComplexNDArray retval (dv); |
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67 Complex *out (retval.fortran_vec ()); |
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68 |
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69 // Need to be careful here about the distance between fft's |
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70 for (int k = 0; k < nloop; k++) |
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71 octave_fftw::fft (in + k * stride * n, out + k * stride * n, |
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72 n, howmany, stride, dist); |
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73 |
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74 return retval; |
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75 } |
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76 |
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77 ComplexNDArray |
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78 NDArray::ifourier (int dim) const |
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79 { |
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80 dim_vector dv = dims (); |
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81 |
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82 if (dim > dv.length () || dim < 0) |
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83 return ComplexNDArray (); |
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84 |
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85 int stride = 1; |
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86 int n = dv(dim); |
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87 |
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88 for (int i = 0; i < dim; i++) |
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89 stride *= dv(i); |
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90 |
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91 int howmany = numel () / dv (dim); |
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92 howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany)); |
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93 int nloop = (stride == 1 ? 1 : numel () / dv (dim) / stride); |
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94 int dist = (stride == 1 ? n : 1); |
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95 |
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96 ComplexNDArray retval (*this); |
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97 Complex *out (retval.fortran_vec ()); |
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98 |
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99 // Need to be careful here about the distance between fft's |
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100 for (int k = 0; k < nloop; k++) |
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101 octave_fftw::ifft (out + k * stride * n, out + k * stride * n, |
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102 n, howmany, stride, dist); |
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103 |
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104 return retval; |
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105 } |
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106 |
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107 ComplexNDArray |
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108 NDArray::fourier2d (void) const |
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109 { |
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110 dim_vector dv = dims(); |
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111 if (dv.length () < 2) |
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112 return ComplexNDArray (); |
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113 |
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114 dim_vector dv2(dv(0), dv(1)); |
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115 const double *in = fortran_vec (); |
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116 ComplexNDArray retval (dv); |
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117 Complex *out = retval.fortran_vec (); |
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118 int howmany = numel() / dv(0) / dv(1); |
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119 int dist = dv(0) * dv(1); |
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120 |
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121 for (int i=0; i < howmany; i++) |
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122 octave_fftw::fftNd (in + i*dist, out + i*dist, 2, dv2); |
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123 |
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124 return retval; |
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125 } |
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126 |
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127 ComplexNDArray |
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128 NDArray::ifourier2d (void) const |
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129 { |
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130 dim_vector dv = dims(); |
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131 if (dv.length () < 2) |
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132 return ComplexNDArray (); |
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133 |
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134 dim_vector dv2(dv(0), dv(1)); |
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135 ComplexNDArray retval (*this); |
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136 Complex *out = retval.fortran_vec (); |
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137 int howmany = numel() / dv(0) / dv(1); |
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138 int dist = dv(0) * dv(1); |
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139 |
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140 for (int i=0; i < howmany; i++) |
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141 octave_fftw::ifftNd (out + i*dist, out + i*dist, 2, dv2); |
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142 |
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143 return retval; |
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144 } |
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145 |
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146 ComplexNDArray |
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147 NDArray::fourierNd (void) const |
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148 { |
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149 dim_vector dv = dims (); |
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150 int rank = dv.length (); |
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151 |
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152 const double *in (fortran_vec ()); |
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153 ComplexNDArray retval (dv); |
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154 Complex *out (retval.fortran_vec ()); |
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155 |
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156 octave_fftw::fftNd (in, out, rank, dv); |
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157 |
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158 return retval; |
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159 } |
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160 |
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161 ComplexNDArray |
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162 NDArray::ifourierNd (void) const |
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163 { |
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164 dim_vector dv = dims (); |
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165 int rank = dv.length (); |
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166 |
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167 ComplexNDArray tmp (*this); |
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168 Complex *in (tmp.fortran_vec ()); |
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169 ComplexNDArray retval (dv); |
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170 Complex *out (retval.fortran_vec ()); |
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171 |
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172 octave_fftw::ifftNd (in, out, rank, dv); |
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173 |
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174 return retval; |
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175 } |
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176 |
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177 #else |
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178 |
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179 extern "C" |
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180 { |
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181 // Note that the original complex fft routines were not written for |
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182 // double complex arguments. They have been modified by adding an |
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183 // implicit double precision (a-h,o-z) statement at the beginning of |
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184 // each subroutine. |
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185 |
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186 F77_RET_T |
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187 F77_FUNC (cffti, CFFTI) (const int&, Complex*); |
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188 |
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189 F77_RET_T |
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190 F77_FUNC (cfftf, CFFTF) (const int&, Complex*, Complex*); |
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191 |
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192 F77_RET_T |
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193 F77_FUNC (cfftb, CFFTB) (const int&, Complex*, Complex*); |
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194 } |
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195 |
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196 ComplexNDArray |
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197 NDArray::fourier (int dim) const |
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198 { |
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199 dim_vector dv = dims (); |
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200 |
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201 if (dim > dv.length () || dim < 0) |
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202 return ComplexNDArray (); |
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203 |
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204 ComplexNDArray retval (dv); |
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205 int npts = dv(dim); |
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206 int nn = 4*npts+15; |
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207 Array<Complex> wsave (nn); |
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208 Complex *pwsave = wsave.fortran_vec (); |
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209 |
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210 OCTAVE_LOCAL_BUFFER (Complex, tmp, npts); |
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211 |
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212 int stride = 1; |
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213 |
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214 for (int i = 0; i < dim; i++) |
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215 stride *= dv(i); |
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216 |
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217 int howmany = numel () / npts; |
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218 howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany)); |
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219 int nloop = (stride == 1 ? 1 : numel () / npts / stride); |
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220 int dist = (stride == 1 ? npts : 1); |
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221 |
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222 F77_FUNC (cffti, CFFTI) (npts, pwsave); |
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223 |
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224 for (int k = 0; k < nloop; k++) |
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225 { |
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226 for (int j = 0; j < howmany; j++) |
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227 { |
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228 OCTAVE_QUIT; |
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229 |
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230 for (int i = 0; i < npts; i++) |
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231 tmp[i] = elem((i + k*npts)*stride + j*dist); |
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232 |
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233 F77_FUNC (cfftf, CFFTF) (npts, tmp, pwsave); |
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234 |
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235 for (int i = 0; i < npts; i++) |
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236 retval ((i + k*npts)*stride + j*dist) = tmp[i]; |
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237 } |
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238 } |
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239 |
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240 return retval; |
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241 } |
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242 |
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243 ComplexNDArray |
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244 NDArray::ifourier (int dim) const |
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245 { |
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246 dim_vector dv = dims (); |
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247 |
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248 if (dim > dv.length () || dim < 0) |
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249 return ComplexNDArray (); |
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250 |
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251 ComplexNDArray retval (dv); |
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252 int npts = dv(dim); |
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253 int nn = 4*npts+15; |
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254 Array<Complex> wsave (nn); |
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255 Complex *pwsave = wsave.fortran_vec (); |
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256 |
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257 OCTAVE_LOCAL_BUFFER (Complex, tmp, npts); |
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258 |
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259 int stride = 1; |
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260 |
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261 for (int i = 0; i < dim; i++) |
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262 stride *= dv(i); |
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263 |
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264 int howmany = numel () / npts; |
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265 howmany = (stride == 1 ? howmany : (howmany > stride ? stride : howmany)); |
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266 int nloop = (stride == 1 ? 1 : numel () / npts / stride); |
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267 int dist = (stride == 1 ? npts : 1); |
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268 |
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269 F77_FUNC (cffti, CFFTI) (npts, pwsave); |
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270 |
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271 for (int k = 0; k < nloop; k++) |
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272 { |
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273 for (int j = 0; j < howmany; j++) |
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274 { |
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275 OCTAVE_QUIT; |
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276 |
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277 for (int i = 0; i < npts; i++) |
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278 tmp[i] = elem((i + k*npts)*stride + j*dist); |
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279 |
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280 F77_FUNC (cfftb, CFFTB) (npts, tmp, pwsave); |
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281 |
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282 for (int i = 0; i < npts; i++) |
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283 retval ((i + k*npts)*stride + j*dist) = tmp[i] / |
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284 static_cast<double> (npts); |
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285 } |
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286 } |
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287 |
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288 return retval; |
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289 } |
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290 |
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291 ComplexNDArray |
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292 NDArray::fourier2d (void) const |
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293 { |
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294 dim_vector dv = dims(); |
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295 dim_vector dv2 (dv(0), dv(1)); |
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296 int rank = 2; |
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297 ComplexNDArray retval (*this); |
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298 int stride = 1; |
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299 |
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300 for (int i = 0; i < rank; i++) |
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301 { |
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302 int npts = dv2(i); |
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303 int nn = 4*npts+15; |
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304 Array<Complex> wsave (nn); |
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305 Complex *pwsave = wsave.fortran_vec (); |
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306 Array<Complex> row (npts); |
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307 Complex *prow = row.fortran_vec (); |
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308 |
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309 int howmany = numel () / npts; |
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310 howmany = (stride == 1 ? howmany : |
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311 (howmany > stride ? stride : howmany)); |
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312 int nloop = (stride == 1 ? 1 : numel () / npts / stride); |
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313 int dist = (stride == 1 ? npts : 1); |
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314 |
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315 F77_FUNC (cffti, CFFTI) (npts, pwsave); |
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316 |
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317 for (int k = 0; k < nloop; k++) |
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318 { |
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319 for (int j = 0; j < howmany; j++) |
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320 { |
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321 OCTAVE_QUIT; |
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322 |
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323 for (int l = 0; l < npts; l++) |
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324 prow[l] = retval ((l + k*npts)*stride + j*dist); |
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325 |
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326 F77_FUNC (cfftf, CFFTF) (npts, prow, pwsave); |
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327 |
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328 for (int l = 0; l < npts; l++) |
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329 retval ((l + k*npts)*stride + j*dist) = prow[l]; |
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330 } |
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331 } |
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332 |
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333 stride *= dv2(i); |
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334 } |
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335 |
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336 return retval; |
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337 } |
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338 |
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339 ComplexNDArray |
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340 NDArray::ifourier2d (void) const |
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341 { |
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342 dim_vector dv = dims(); |
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343 dim_vector dv2 (dv(0), dv(1)); |
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344 int rank = 2; |
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345 ComplexNDArray retval (*this); |
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346 int stride = 1; |
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347 |
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348 for (int i = 0; i < rank; i++) |
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349 { |
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350 int npts = dv2(i); |
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351 int nn = 4*npts+15; |
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352 Array<Complex> wsave (nn); |
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353 Complex *pwsave = wsave.fortran_vec (); |
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354 Array<Complex> row (npts); |
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355 Complex *prow = row.fortran_vec (); |
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356 |
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357 int howmany = numel () / npts; |
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358 howmany = (stride == 1 ? howmany : |
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359 (howmany > stride ? stride : howmany)); |
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360 int nloop = (stride == 1 ? 1 : numel () / npts / stride); |
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361 int dist = (stride == 1 ? npts : 1); |
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362 |
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363 F77_FUNC (cffti, CFFTI) (npts, pwsave); |
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364 |
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365 for (int k = 0; k < nloop; k++) |
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366 { |
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367 for (int j = 0; j < howmany; j++) |
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368 { |
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369 OCTAVE_QUIT; |
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370 |
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371 for (int l = 0; l < npts; l++) |
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372 prow[l] = retval ((l + k*npts)*stride + j*dist); |
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373 |
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374 F77_FUNC (cfftb, CFFTB) (npts, prow, pwsave); |
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375 |
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376 for (int l = 0; l < npts; l++) |
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377 retval ((l + k*npts)*stride + j*dist) = prow[l] / |
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378 static_cast<double> (npts); |
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379 } |
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380 } |
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381 |
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382 stride *= dv2(i); |
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383 } |
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384 |
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385 return retval; |
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386 } |
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387 |
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388 ComplexNDArray |
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389 NDArray::fourierNd (void) const |
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390 { |
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391 dim_vector dv = dims (); |
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392 int rank = dv.length (); |
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393 ComplexNDArray retval (*this); |
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394 int stride = 1; |
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395 |
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396 for (int i = 0; i < rank; i++) |
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397 { |
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398 int npts = dv(i); |
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399 int nn = 4*npts+15; |
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400 Array<Complex> wsave (nn); |
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401 Complex *pwsave = wsave.fortran_vec (); |
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402 Array<Complex> row (npts); |
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403 Complex *prow = row.fortran_vec (); |
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404 |
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405 int howmany = numel () / npts; |
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406 howmany = (stride == 1 ? howmany : |
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407 (howmany > stride ? stride : howmany)); |
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408 int nloop = (stride == 1 ? 1 : numel () / npts / stride); |
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409 int dist = (stride == 1 ? npts : 1); |
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410 |
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411 F77_FUNC (cffti, CFFTI) (npts, pwsave); |
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412 |
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413 for (int k = 0; k < nloop; k++) |
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414 { |
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415 for (int j = 0; j < howmany; j++) |
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416 { |
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417 OCTAVE_QUIT; |
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418 |
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419 for (int l = 0; l < npts; l++) |
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420 prow[l] = retval ((l + k*npts)*stride + j*dist); |
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421 |
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422 F77_FUNC (cfftf, CFFTF) (npts, prow, pwsave); |
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423 |
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424 for (int l = 0; l < npts; l++) |
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425 retval ((l + k*npts)*stride + j*dist) = prow[l]; |
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426 } |
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427 } |
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428 |
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429 stride *= dv(i); |
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430 } |
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431 |
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432 return retval; |
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433 } |
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434 |
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435 ComplexNDArray |
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436 NDArray::ifourierNd (void) const |
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437 { |
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438 dim_vector dv = dims (); |
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439 int rank = dv.length (); |
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440 ComplexNDArray retval (*this); |
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441 int stride = 1; |
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442 |
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443 for (int i = 0; i < rank; i++) |
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444 { |
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445 int npts = dv(i); |
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446 int nn = 4*npts+15; |
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447 Array<Complex> wsave (nn); |
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448 Complex *pwsave = wsave.fortran_vec (); |
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449 Array<Complex> row (npts); |
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450 Complex *prow = row.fortran_vec (); |
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451 |
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452 int howmany = numel () / npts; |
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453 howmany = (stride == 1 ? howmany : |
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454 (howmany > stride ? stride : howmany)); |
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455 int nloop = (stride == 1 ? 1 : numel () / npts / stride); |
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456 int dist = (stride == 1 ? npts : 1); |
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457 |
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458 F77_FUNC (cffti, CFFTI) (npts, pwsave); |
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459 |
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460 for (int k = 0; k < nloop; k++) |
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461 { |
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462 for (int j = 0; j < howmany; j++) |
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463 { |
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464 OCTAVE_QUIT; |
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465 |
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466 for (int l = 0; l < npts; l++) |
|
|
467 prow[l] = retval ((l + k*npts)*stride + j*dist); |
|
|
468 |
|
|
469 F77_FUNC (cfftb, CFFTB) (npts, prow, pwsave); |
|
|
470 |
|
|
471 for (int l = 0; l < npts; l++) |
|
|
472 retval ((l + k*npts)*stride + j*dist) = prow[l] / |
|
|
473 static_cast<double> (npts); |
|
|
474 } |
|
|
475 } |
|
|
476 |
|
|
477 stride *= dv(i); |
|
|
478 } |
|
|
479 |
|
|
480 return retval; |
|
|
481 } |
|
|
482 |
|
|
483 #endif |
|
|
484 |
|
4543
|
485 // unary operations |
|
|
486 |
|
|
487 boolNDArray |
|
|
488 NDArray::operator ! (void) const |
|
|
489 { |
|
|
490 boolNDArray b (dims ()); |
|
|
491 |
|
|
492 for (int i = 0; i < length (); i++) |
|
|
493 b.elem (i) = ! elem (i); |
|
|
494 |
|
|
495 return b; |
|
|
496 } |
|
|
497 |
|
4634
|
498 bool |
|
|
499 NDArray::any_element_is_negative (bool neg_zero) const |
|
|
500 { |
|
|
501 int nel = nelem (); |
|
|
502 |
|
|
503 if (neg_zero) |
|
|
504 { |
|
|
505 for (int i = 0; i < nel; i++) |
|
|
506 if (lo_ieee_signbit (elem (i))) |
|
|
507 return true; |
|
|
508 } |
|
|
509 else |
|
|
510 { |
|
|
511 for (int i = 0; i < nel; i++) |
|
|
512 if (elem (i) < 0) |
|
|
513 return true; |
|
|
514 } |
|
|
515 |
|
|
516 return false; |
|
|
517 } |
|
|
518 |
|
|
519 |
|
|
520 bool |
|
|
521 NDArray::any_element_is_inf_or_nan (void) const |
|
|
522 { |
|
|
523 int nel = nelem (); |
|
|
524 |
|
|
525 for (int i = 0; i < nel; i++) |
|
|
526 { |
|
|
527 double val = elem (i); |
|
|
528 if (xisinf (val) || xisnan (val)) |
|
|
529 return true; |
|
|
530 } |
|
|
531 |
|
|
532 return false; |
|
|
533 } |
|
|
534 |
|
|
535 bool |
|
|
536 NDArray::all_elements_are_int_or_inf_or_nan (void) const |
|
|
537 { |
|
|
538 int nel = nelem (); |
|
|
539 |
|
|
540 for (int i = 0; i < nel; i++) |
|
|
541 { |
|
|
542 double val = elem (i); |
|
|
543 if (xisnan (val) || D_NINT (val) == val) |
|
|
544 continue; |
|
|
545 else |
|
|
546 return false; |
|
|
547 } |
|
|
548 |
|
|
549 return true; |
|
|
550 } |
|
|
551 |
|
|
552 // Return nonzero if any element of M is not an integer. Also extract |
|
|
553 // the largest and smallest values and return them in MAX_VAL and MIN_VAL. |
|
|
554 |
|
|
555 bool |
|
|
556 NDArray::all_integers (double& max_val, double& min_val) const |
|
|
557 { |
|
|
558 int nel = nelem (); |
|
|
559 |
|
|
560 if (nel > 0) |
|
|
561 { |
|
|
562 max_val = elem (0); |
|
|
563 min_val = elem (0); |
|
|
564 } |
|
|
565 else |
|
|
566 return false; |
|
|
567 |
|
|
568 for (int i = 0; i < nel; i++) |
|
|
569 { |
|
|
570 double val = elem (i); |
|
|
571 |
|
|
572 if (val > max_val) |
|
|
573 max_val = val; |
|
|
574 |
|
|
575 if (val < min_val) |
|
|
576 min_val = val; |
|
|
577 |
|
|
578 if (D_NINT (val) != val) |
|
|
579 return false; |
|
|
580 } |
|
|
581 |
|
|
582 return true; |
|
|
583 } |
|
|
584 |
|
|
585 bool |
|
|
586 NDArray::too_large_for_float (void) const |
|
|
587 { |
|
|
588 int nel = nelem (); |
|
|
589 |
|
|
590 for (int i = 0; i < nel; i++) |
|
|
591 { |
|
|
592 double val = elem (i); |
|
|
593 |
|
|
594 if (val > FLT_MAX || val < FLT_MIN) |
|
|
595 return true; |
|
|
596 } |
|
|
597 |
|
|
598 return false; |
|
|
599 } |
|
|
600 |
|
4513
|
601 // XXX FIXME XXX -- this is not quite the right thing. |
|
|
602 |
|
4556
|
603 boolNDArray |
|
4513
|
604 NDArray::all (int dim) const |
|
|
605 { |
|
4569
|
606 MX_ND_ANY_ALL_REDUCTION (MX_ND_ALL_EVAL (MX_ND_ALL_EXPR), true); |
|
4513
|
607 } |
|
|
608 |
|
4556
|
609 boolNDArray |
|
4513
|
610 NDArray::any (int dim) const |
|
|
611 { |
|
4569
|
612 MX_ND_ANY_ALL_REDUCTION (MX_ND_ANY_EVAL (MX_ND_ANY_EXPR), false); |
|
|
613 } |
|
|
614 |
|
4584
|
615 NDArray |
|
4569
|
616 NDArray::cumprod (int dim) const |
|
|
617 { |
|
4584
|
618 MX_ND_CUMULATIVE_OP (NDArray, double, 1, *); |
|
4569
|
619 } |
|
|
620 |
|
4584
|
621 NDArray |
|
4569
|
622 NDArray::cumsum (int dim) const |
|
|
623 { |
|
4584
|
624 MX_ND_CUMULATIVE_OP (NDArray, double, 0, +); |
|
4513
|
625 } |
|
|
626 |
|
4569
|
627 NDArray |
|
|
628 NDArray::prod (int dim) const |
|
|
629 { |
|
|
630 MX_ND_REAL_OP_REDUCTION (*= elem (iter_idx), 1); |
|
|
631 } |
|
|
632 |
|
|
633 NDArray |
|
|
634 NDArray::sumsq (int dim) const |
|
|
635 { |
|
|
636 MX_ND_REAL_OP_REDUCTION (+= std::pow (elem (iter_idx), 2), 0); |
|
|
637 } |
|
|
638 |
|
|
639 NDArray |
|
|
640 NDArray::sum (int dim) const |
|
|
641 { |
|
|
642 MX_ND_REAL_OP_REDUCTION (+= elem (iter_idx), 0); |
|
|
643 } |
|
|
644 |
|
4844
|
645 NDArray |
|
|
646 NDArray::max (int dim) const |
|
|
647 { |
|
|
648 ArrayN<int> dummy_idx; |
|
|
649 return max (dummy_idx, dim); |
|
|
650 } |
|
|
651 |
|
|
652 NDArray |
|
|
653 NDArray::max (ArrayN<int>& idx_arg, int dim) const |
|
|
654 { |
|
|
655 dim_vector dv = dims (); |
|
|
656 dim_vector dr = dims (); |
|
|
657 |
|
|
658 if (dv.numel () == 0 || dim > dv.length () || dim < 0) |
|
|
659 return NDArray (); |
|
|
660 |
|
|
661 dr(dim) = 1; |
|
|
662 |
|
|
663 NDArray result (dr); |
|
|
664 idx_arg.resize (dr); |
|
|
665 |
|
|
666 int x_stride = 1; |
|
|
667 int x_len = dv(dim); |
|
|
668 for (int i = 0; i < dim; i++) |
|
|
669 x_stride *= dv(i); |
|
|
670 |
|
|
671 for (int i = 0; i < dr.numel (); i++) |
|
|
672 { |
|
|
673 int x_offset; |
|
|
674 if (x_stride == 1) |
|
|
675 x_offset = i * x_len; |
|
|
676 else |
|
|
677 { |
|
|
678 int x_offset2 = 0; |
|
|
679 x_offset = i; |
|
|
680 while (x_offset >= x_stride) |
|
|
681 { |
|
|
682 x_offset -= x_stride; |
|
|
683 x_offset2++; |
|
|
684 } |
|
|
685 x_offset += x_offset2 * x_stride * x_len; |
|
|
686 } |
|
|
687 |
|
|
688 int idx_j; |
|
|
689 |
|
|
690 double tmp_max = octave_NaN; |
|
|
691 |
|
|
692 for (idx_j = 0; idx_j < x_len; idx_j++) |
|
|
693 { |
|
|
694 tmp_max = elem (idx_j * x_stride + x_offset); |
|
|
695 |
|
|
696 if (! octave_is_NaN_or_NA (tmp_max)) |
|
|
697 break; |
|
|
698 } |
|
|
699 |
|
|
700 for (int j = idx_j+1; j < x_len; j++) |
|
|
701 { |
|
|
702 double tmp = elem (j * x_stride + x_offset); |
|
|
703 |
|
|
704 if (octave_is_NaN_or_NA (tmp)) |
|
|
705 continue; |
|
|
706 else if (tmp > tmp_max) |
|
|
707 { |
|
|
708 idx_j = j; |
|
|
709 tmp_max = tmp; |
|
|
710 } |
|
|
711 } |
|
|
712 |
|
|
713 result.elem (i) = tmp_max; |
|
|
714 idx_arg.elem (i) = octave_is_NaN_or_NA (tmp_max) ? 0 : idx_j; |
|
|
715 } |
|
|
716 |
|
|
717 return result; |
|
|
718 } |
|
|
719 |
|
|
720 NDArray |
|
|
721 NDArray::min (int dim) const |
|
|
722 { |
|
|
723 ArrayN<int> dummy_idx; |
|
|
724 return min (dummy_idx, dim); |
|
|
725 } |
|
|
726 |
|
|
727 NDArray |
|
|
728 NDArray::min (ArrayN<int>& idx_arg, int dim) const |
|
|
729 { |
|
|
730 dim_vector dv = dims (); |
|
|
731 dim_vector dr = dims (); |
|
|
732 |
|
|
733 if (dv.numel () == 0 || dim > dv.length () || dim < 0) |
|
|
734 return NDArray (); |
|
|
735 |
|
|
736 dr(dim) = 1; |
|
|
737 |
|
|
738 NDArray result (dr); |
|
|
739 idx_arg.resize (dr); |
|
|
740 |
|
|
741 int x_stride = 1; |
|
|
742 int x_len = dv(dim); |
|
|
743 for (int i = 0; i < dim; i++) |
|
|
744 x_stride *= dv(i); |
|
|
745 |
|
|
746 for (int i = 0; i < dr.numel (); i++) |
|
|
747 { |
|
|
748 int x_offset; |
|
|
749 if (x_stride == 1) |
|
|
750 x_offset = i * x_len; |
|
|
751 else |
|
|
752 { |
|
|
753 int x_offset2 = 0; |
|
|
754 x_offset = i; |
|
|
755 while (x_offset >= x_stride) |
|
|
756 { |
|
|
757 x_offset -= x_stride; |
|
|
758 x_offset2++; |
|
|
759 } |
|
|
760 x_offset += x_offset2 * x_stride * x_len; |
|
|
761 } |
|
|
762 |
|
|
763 int idx_j; |
|
|
764 |
|
|
765 double tmp_min = octave_NaN; |
|
|
766 |
|
|
767 for (idx_j = 0; idx_j < x_len; idx_j++) |
|
|
768 { |
|
|
769 tmp_min = elem (idx_j * x_stride + x_offset); |
|
|
770 |
|
|
771 if (! octave_is_NaN_or_NA (tmp_min)) |
|
|
772 break; |
|
|
773 } |
|
|
774 |
|
|
775 for (int j = idx_j+1; j < x_len; j++) |
|
|
776 { |
|
|
777 double tmp = elem (j * x_stride + x_offset); |
|
|
778 |
|
|
779 if (octave_is_NaN_or_NA (tmp)) |
|
|
780 continue; |
|
|
781 else if (tmp < tmp_min) |
|
|
782 { |
|
|
783 idx_j = j; |
|
|
784 tmp_min = tmp; |
|
|
785 } |
|
|
786 } |
|
|
787 |
|
|
788 result.elem (i) = tmp_min; |
|
|
789 idx_arg.elem (i) = octave_is_NaN_or_NA (tmp_min) ? 0 : idx_j; |
|
|
790 } |
|
|
791 |
|
|
792 return result; |
|
|
793 } |
|
|
794 |
|
4806
|
795 int |
|
|
796 NDArray::cat (const NDArray& ra_arg, int dim, int iidx, int move) |
|
4758
|
797 { |
|
4806
|
798 return ::cat_ra (*this, ra_arg, dim, iidx, move); |
|
4758
|
799 } |
|
|
800 |
|
4634
|
801 NDArray |
|
|
802 real (const ComplexNDArray& a) |
|
|
803 { |
|
|
804 int a_len = a.length (); |
|
|
805 NDArray retval; |
|
|
806 if (a_len > 0) |
|
|
807 retval = NDArray (mx_inline_real_dup (a.data (), a_len), a.dims ()); |
|
|
808 return retval; |
|
|
809 } |
|
|
810 |
|
|
811 NDArray |
|
|
812 imag (const ComplexNDArray& a) |
|
|
813 { |
|
|
814 int a_len = a.length (); |
|
|
815 NDArray retval; |
|
|
816 if (a_len > 0) |
|
|
817 retval = NDArray (mx_inline_imag_dup (a.data (), a_len), a.dims ()); |
|
|
818 return retval; |
|
|
819 } |
|
|
820 |
|
|
821 NDArray |
|
4569
|
822 NDArray::abs (void) const |
|
|
823 { |
|
4634
|
824 NDArray retval (dims ()); |
|
4569
|
825 |
|
4634
|
826 int nel = nelem (); |
|
|
827 |
|
|
828 for (int i = 0; i < nel; i++) |
|
|
829 retval(i) = fabs (elem (i)); |
|
4569
|
830 |
|
|
831 return retval; |
|
|
832 } |
|
|
833 |
|
4532
|
834 Matrix |
|
|
835 NDArray::matrix_value (void) const |
|
|
836 { |
|
|
837 Matrix retval; |
|
|
838 |
|
|
839 int nd = ndims (); |
|
|
840 |
|
|
841 switch (nd) |
|
|
842 { |
|
|
843 case 1: |
|
|
844 retval = Matrix (Array2<double> (*this, dimensions(0), 1)); |
|
|
845 break; |
|
|
846 |
|
|
847 case 2: |
|
|
848 retval = Matrix (Array2<double> (*this, dimensions(0), dimensions(1))); |
|
|
849 break; |
|
|
850 |
|
|
851 default: |
|
|
852 (*current_liboctave_error_handler) |
|
4770
|
853 ("invalid conversion of NDArray to Matrix"); |
|
4532
|
854 break; |
|
|
855 } |
|
|
856 |
|
|
857 return retval; |
|
|
858 } |
|
|
859 |
|
|
860 void |
|
|
861 NDArray::increment_index (Array<int>& ra_idx, |
|
|
862 const dim_vector& dimensions, |
|
|
863 int start_dimension) |
|
|
864 { |
|
|
865 ::increment_index (ra_idx, dimensions, start_dimension); |
|
|
866 } |
|
|
867 |
|
4556
|
868 int |
|
|
869 NDArray::compute_index (Array<int>& ra_idx, |
|
|
870 const dim_vector& dimensions) |
|
|
871 { |
|
|
872 return ::compute_index (ra_idx, dimensions); |
|
|
873 } |
|
|
874 |
|
4687
|
875 // This contains no information on the array structure !!! |
|
|
876 std::ostream& |
|
|
877 operator << (std::ostream& os, const NDArray& a) |
|
|
878 { |
|
|
879 int nel = a.nelem (); |
|
|
880 |
|
|
881 for (int i = 0; i < nel; i++) |
|
|
882 { |
|
|
883 os << " "; |
|
|
884 octave_write_double (os, a.elem (i)); |
|
|
885 os << "\n"; |
|
|
886 } |
|
|
887 return os; |
|
|
888 } |
|
|
889 |
|
|
890 std::istream& |
|
|
891 operator >> (std::istream& is, NDArray& a) |
|
|
892 { |
|
|
893 int nel = a.nelem (); |
|
|
894 |
|
|
895 if (nel < 1 ) |
|
|
896 is.clear (std::ios::badbit); |
|
|
897 else |
|
|
898 { |
|
|
899 double tmp; |
|
|
900 for (int i = 0; i < nel; i++) |
|
|
901 { |
|
|
902 tmp = octave_read_double (is); |
|
|
903 if (is) |
|
|
904 a.elem (i) = tmp; |
|
|
905 else |
|
|
906 goto done; |
|
|
907 } |
|
|
908 } |
|
|
909 |
|
|
910 done: |
|
|
911 |
|
|
912 return is; |
|
|
913 } |
|
|
914 |
|
4844
|
915 // XXX FIXME XXX -- it would be nice to share code among the min/max |
|
|
916 // functions below. |
|
|
917 |
|
|
918 #define EMPTY_RETURN_CHECK(T) \ |
|
|
919 if (nel == 0) \ |
|
|
920 return T (dv); |
|
|
921 |
|
|
922 NDArray |
|
|
923 min (double d, const NDArray& m) |
|
|
924 { |
|
|
925 dim_vector dv = m.dims (); |
|
|
926 int nel = dv.numel (); |
|
|
927 |
|
|
928 EMPTY_RETURN_CHECK (NDArray); |
|
|
929 |
|
|
930 NDArray result (dv); |
|
|
931 |
|
|
932 for (int i = 0; i < nel; i++) |
|
|
933 { |
|
|
934 OCTAVE_QUIT; |
|
|
935 result (i) = xmin (d, m (i)); |
|
|
936 } |
|
|
937 |
|
|
938 return result; |
|
|
939 } |
|
|
940 |
|
|
941 NDArray |
|
|
942 min (const NDArray& m, double d) |
|
|
943 { |
|
|
944 dim_vector dv = m.dims (); |
|
|
945 int nel = dv.numel (); |
|
|
946 |
|
|
947 EMPTY_RETURN_CHECK (NDArray); |
|
|
948 |
|
|
949 NDArray result (dv); |
|
|
950 |
|
|
951 for (int i = 0; i < nel; i++) |
|
|
952 { |
|
|
953 OCTAVE_QUIT; |
|
|
954 result (i) = xmin (d, m (i)); |
|
|
955 } |
|
|
956 |
|
|
957 return result; |
|
|
958 } |
|
|
959 |
|
|
960 NDArray |
|
|
961 min (const NDArray& a, const NDArray& b) |
|
|
962 { |
|
|
963 dim_vector dv = a.dims (); |
|
|
964 int nel = dv.numel (); |
|
|
965 |
|
|
966 if (dv != b.dims ()) |
|
|
967 { |
|
|
968 (*current_liboctave_error_handler) |
|
|
969 ("two-arg min expecting args of same size"); |
|
|
970 return NDArray (); |
|
|
971 } |
|
|
972 |
|
|
973 EMPTY_RETURN_CHECK (NDArray); |
|
|
974 |
|
|
975 NDArray result (dv); |
|
|
976 |
|
|
977 for (int i = 0; i < nel; i++) |
|
|
978 { |
|
|
979 OCTAVE_QUIT; |
|
|
980 result (i) = xmin (a (i), b (i)); |
|
|
981 } |
|
|
982 |
|
|
983 return result; |
|
|
984 } |
|
|
985 |
|
|
986 NDArray |
|
|
987 max (double d, const NDArray& m) |
|
|
988 { |
|
|
989 dim_vector dv = m.dims (); |
|
|
990 int nel = dv.numel (); |
|
|
991 |
|
|
992 EMPTY_RETURN_CHECK (NDArray); |
|
|
993 |
|
|
994 NDArray result (dv); |
|
|
995 |
|
|
996 for (int i = 0; i < nel; i++) |
|
|
997 { |
|
|
998 OCTAVE_QUIT; |
|
|
999 result (i) = xmax (d, m (i)); |
|
|
1000 } |
|
|
1001 |
|
|
1002 return result; |
|
|
1003 } |
|
|
1004 |
|
|
1005 NDArray |
|
|
1006 max (const NDArray& m, double d) |
|
|
1007 { |
|
|
1008 dim_vector dv = m.dims (); |
|
|
1009 int nel = dv.numel (); |
|
|
1010 |
|
|
1011 EMPTY_RETURN_CHECK (NDArray); |
|
|
1012 |
|
|
1013 NDArray result (dv); |
|
|
1014 |
|
|
1015 for (int i = 0; i < nel; i++) |
|
|
1016 { |
|
|
1017 OCTAVE_QUIT; |
|
|
1018 result (i) = xmax (d, m (i)); |
|
|
1019 } |
|
|
1020 |
|
|
1021 return result; |
|
|
1022 } |
|
|
1023 |
|
|
1024 NDArray |
|
|
1025 max (const NDArray& a, const NDArray& b) |
|
|
1026 { |
|
|
1027 dim_vector dv = a.dims (); |
|
|
1028 int nel = dv.numel (); |
|
|
1029 |
|
|
1030 if (dv != b.dims ()) |
|
|
1031 { |
|
|
1032 (*current_liboctave_error_handler) |
|
|
1033 ("two-arg max expecting args of same size"); |
|
|
1034 return NDArray (); |
|
|
1035 } |
|
|
1036 |
|
|
1037 EMPTY_RETURN_CHECK (NDArray); |
|
|
1038 |
|
|
1039 NDArray result (dv); |
|
|
1040 |
|
|
1041 for (int i = 0; i < nel; i++) |
|
|
1042 { |
|
|
1043 OCTAVE_QUIT; |
|
|
1044 result (i) = xmax (a (i), b (i)); |
|
|
1045 } |
|
|
1046 |
|
|
1047 return result; |
|
|
1048 } |
|
|
1049 |
|
4543
|
1050 NDS_CMP_OPS(NDArray, , double, ) |
|
|
1051 NDS_BOOL_OPS(NDArray, double, 0.0) |
|
|
1052 |
|
|
1053 SND_CMP_OPS(double, , NDArray, ) |
|
|
1054 SND_BOOL_OPS(double, NDArray, 0.0) |
|
|
1055 |
|
|
1056 NDND_CMP_OPS(NDArray, , NDArray, ) |
|
|
1057 NDND_BOOL_OPS(NDArray, NDArray, 0.0) |
|
|
1058 |
|
4513
|
1059 /* |
|
|
1060 ;;; Local Variables: *** |
|
|
1061 ;;; mode: C++ *** |
|
|
1062 ;;; End: *** |
|
|
1063 */ |
