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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 // XXX FIXME XXX -- this is not quite the right thing. |
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38 |
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39 boolMatrix |
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40 NDArray::all (int dim) const |
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41 { |
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42 boolMatrix retval; |
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43 |
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44 if (dimensions.length () == 2) |
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45 { |
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46 Matrix tmp = matrix_value (); |
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47 retval = tmp.all (dim); |
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48 } |
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49 else |
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50 (*current_liboctave_error_handler) |
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51 ("all is not yet implemented for N-d Arrays"); |
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52 |
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53 return retval; |
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54 } |
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55 |
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56 boolMatrix |
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57 NDArray::any (int dim) const |
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58 { |
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59 boolMatrix retval; |
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60 |
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61 if (dimensions.length () == 2) |
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62 { |
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63 Matrix tmp = matrix_value (); |
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64 retval = tmp.any (dim); |
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65 } |
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66 else |
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67 (*current_liboctave_error_handler) |
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68 ("any is not yet implemented for N-d Arrays"); |
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69 |
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70 return retval; |
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71 } |
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72 |
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73 bool |
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74 NDArray::any_element_is_negative (bool neg_zero) const |
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75 { |
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76 int n = length (); |
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77 if (neg_zero) |
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78 { |
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79 for (int i = 0; i < n; i++) |
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80 if (lo_ieee_signbit (Array<double>::elem (i))) |
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81 return true; |
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82 } |
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83 else |
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84 { |
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85 for (int i = 0; i < n; i++) |
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86 if (Array<double>::elem (i) < 0) |
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87 return true; |
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88 } |
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89 |
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90 return false; |
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91 } |
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92 |
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93 bool |
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94 NDArray::all_integers (double& max_val, double& min_val) const |
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95 { |
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96 int n = length (); |
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97 |
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98 if (n > 0) |
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99 { |
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100 max_val = Array<double>::elem (0); |
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101 min_val = Array<double>::elem (0); |
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102 } |
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103 else |
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104 return false; |
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105 |
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106 for (int i = 0; i < n; i++) |
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107 { |
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108 double val = Array<double>::elem (0); |
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109 |
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110 if (val > max_val) |
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111 max_val = val; |
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112 |
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113 if (val < min_val) |
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114 min_val = val; |
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115 |
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116 if (D_NINT (val) != val) |
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117 return false; |
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118 } |
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119 |
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120 return true; |
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121 } |
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122 |
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123 Matrix |
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124 NDArray::matrix_value (void) const |
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125 { |
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126 Matrix retval; |
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127 |
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128 int nd = ndims (); |
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129 |
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130 switch (nd) |
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131 { |
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132 case 1: |
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133 retval = Matrix (Array2<double> (*this, dimensions(0), 1)); |
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134 break; |
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135 |
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136 case 2: |
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137 retval = Matrix (Array2<double> (*this, dimensions(0), dimensions(1))); |
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138 break; |
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139 |
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140 default: |
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141 (*current_liboctave_error_handler) |
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142 ("invalid converstion of NDArray to Matrix"); |
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143 break; |
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144 } |
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145 |
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146 return retval; |
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147 } |
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148 |
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149 /* |
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150 ;;; Local Variables: *** |
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151 ;;; mode: C++ *** |
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152 ;;; End: *** |
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153 */ |
