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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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32 #include "dNDArray.h" |
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33 #include "mx-base.h" |
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34 #include "lo-error.h" |
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35 #include "lo-ieee.h" |
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36 |
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37 #include "ArrayN-inline.h" |
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38 |
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39 NDArray::NDArray (const boolNDArray& a) |
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40 : MArrayN<double> (a.dims ()) |
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41 { |
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42 for (int i = 0; i < a.length (); i++) |
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43 elem (i) = a.elem (i); |
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44 } |
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45 |
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46 NDArray::NDArray (const charNDArray& a) |
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47 : MArrayN<double> (a.dims ()) |
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48 { |
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49 for (int i = 0; i < a.length (); i++) |
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50 elem (i) = a.elem (i); |
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51 } |
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52 |
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53 // unary operations |
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54 |
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55 boolNDArray |
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56 NDArray::operator ! (void) const |
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57 { |
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58 boolNDArray b (dims ()); |
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59 |
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60 for (int i = 0; i < length (); i++) |
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61 b.elem (i) = ! elem (i); |
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62 |
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63 return b; |
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64 } |
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65 |
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66 // XXX FIXME XXX -- this is not quite the right thing. |
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67 |
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68 boolNDArray |
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69 NDArray::all (int dim) const |
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70 { |
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71 MX_ND_ANY_ALL (MX_ND_ALL_EVAL (MX_ND_ALL_EXPR), true); |
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72 } |
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73 |
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74 boolNDArray |
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75 NDArray::any (int dim) const |
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76 { |
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77 MX_ND_ANY_ALL (MX_ND_ANY_EVAL (MX_ND_ANY_EXPR), false); |
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78 } |
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79 |
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80 Matrix |
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81 NDArray::matrix_value (void) const |
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82 { |
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83 Matrix retval; |
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84 |
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85 int nd = ndims (); |
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86 |
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87 switch (nd) |
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88 { |
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89 case 1: |
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90 retval = Matrix (Array2<double> (*this, dimensions(0), 1)); |
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91 break; |
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92 |
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93 case 2: |
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94 retval = Matrix (Array2<double> (*this, dimensions(0), dimensions(1))); |
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95 break; |
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96 |
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97 default: |
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98 (*current_liboctave_error_handler) |
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99 ("invalid converstion of NDArray to Matrix"); |
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100 break; |
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101 } |
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102 |
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103 return retval; |
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104 } |
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105 |
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106 void |
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107 NDArray::increment_index (Array<int>& ra_idx, |
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108 const dim_vector& dimensions, |
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109 int start_dimension) |
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110 { |
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111 ::increment_index (ra_idx, dimensions, start_dimension); |
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112 } |
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113 |
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114 int |
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115 NDArray::compute_index (Array<int>& ra_idx, |
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116 const dim_vector& dimensions) |
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117 { |
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118 return ::compute_index (ra_idx, dimensions); |
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119 } |
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120 |
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121 bool |
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122 NDArray::any_element_is_negative (bool neg_zero) const |
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123 { |
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124 int n = length (); |
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125 if (neg_zero) |
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126 { |
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127 for (int i = 0; i < n; i++) |
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128 if (lo_ieee_signbit (Array<double>::elem (i))) |
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129 return true; |
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130 } |
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131 else |
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132 { |
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133 for (int i = 0; i < n; i++) |
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134 if (Array<double>::elem (i) < 0) |
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135 return true; |
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136 } |
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137 |
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138 return false; |
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139 } |
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140 |
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141 bool |
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142 NDArray::all_integers (double& max_val, double& min_val) const |
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143 { |
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144 int n = length (); |
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145 |
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146 if (n > 0) |
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147 { |
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148 max_val = Array<double>::elem (0); |
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149 min_val = Array<double>::elem (0); |
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150 } |
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151 else |
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152 return false; |
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153 |
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154 for (int i = 0; i < n; i++) |
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155 { |
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156 double val = Array<double>::elem (0); |
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157 |
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158 if (val > max_val) |
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159 max_val = val; |
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160 |
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161 if (val < min_val) |
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162 min_val = val; |
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163 |
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164 if (D_NINT (val) != val) |
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165 return false; |
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166 } |
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167 |
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168 return true; |
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169 } |
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170 |
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171 NDS_CMP_OPS(NDArray, , double, ) |
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172 NDS_BOOL_OPS(NDArray, double, 0.0) |
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173 |
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174 SND_CMP_OPS(double, , NDArray, ) |
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175 SND_BOOL_OPS(double, NDArray, 0.0) |
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176 |
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177 NDND_CMP_OPS(NDArray, , NDArray, ) |
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178 NDND_BOOL_OPS(NDArray, NDArray, 0.0) |
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179 |
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180 /* |
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181 ;;; Local Variables: *** |
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182 ;;; mode: C++ *** |
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183 ;;; End: *** |
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184 */ |
