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1 /* |
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2 |
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3 Copyright (C) 2005 Mohamed Kamoun |
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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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <string> |
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29 |
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30 #include "lo-mappers.h" |
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31 |
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32 #include "Cell.h" |
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33 #include "defun-dld.h" |
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34 #include "parse.h" |
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35 #include "variables.h" |
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36 #include "ov-colon.h" |
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37 |
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38 DEFUN_DLD (cellfun, args, , |
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39 " -*- texinfo -*-\n\ |
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40 @deftypefn {Lodable Function} {} cellfun (@var{name}, @var{c})\n\ |
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41 @deftypefnx {Lodable Function} {} cellfun (\"size\", @var{c}, @var{k})\n\ |
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42 @deftypefnx {Lodable Function} {} cellfun (\"isclass\", @var{c}, @var{class})\n\ |
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43 @deftypefnx {Lodable Function} {} cellfun (@var{func}, @var{c})\n\ |
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44 \n\ |
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45 Evaluate the function named @var{name} on the elements of the cell array\n\ |
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46 @var{c}. Elements in @var{c} are passed on to the named function\n\ |
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47 individually. The function @var{name} can be one of the functions\n\ |
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48 \n\ |
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49 @table @code\n\ |
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50 @item isempty\n\ |
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51 Return 1 for empty elements.\n\ |
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52 @item islogical\n\ |
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53 Return 1 for logical elements.\n\ |
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54 @item isreal\n\ |
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55 Return 1 for real elements.\n\ |
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56 @item length\n\ |
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57 Return a vector of the lengths of cell elements.\n\ |
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58 @item ndims\n\ |
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59 Return the number of dimensions of each element.\n\ |
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60 @item prodofsize\n\ |
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61 Return the product of dimensions of each element.\n\ |
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62 @item size\n\ |
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63 Return the size along the @var{k}-th dimension.\n\ |
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64 @item isclass\n\ |
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65 Return 1 for elements of @var{class}.\n\ |
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66 @end table\n\ |
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67 \n\ |
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68 Additionally, @code{cellfun} accepts an arbitrary function @var{func}\n\ |
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69 in the form of an inline function, function handle, or the name of a\n\ |
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70 function (in a character string). The function should take a single\n\ |
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71 argument and return a single value, and in the case of a character string\n\ |
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72 argument, the argument must be named @var{x}. For example\n\ |
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73 \n\ |
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74 @example\n\ |
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75 @group\n\ |
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76 cellfun (\"tolower(x)\", @{\"Foo\", \"Bar\", \"FooBar\"@})\n\ |
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77 @result{} ans = @{\"foo\", \"bar\", \"foobar\"@}\n\ |
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78 @end group\n\ |
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79 @end example\n\ |
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80 @seealso{isempty, islogical, isreal, length, ndims, numel, size, isclass}\n\ |
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81 @end deftypefn") |
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82 { |
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83 octave_value retval; |
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84 |
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85 std::string name = "function"; |
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86 |
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87 octave_function *func = 0; |
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88 |
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89 int nargin = args.length (); |
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90 |
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91 if (nargin < 2) |
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92 { |
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93 error ("cellfun: you must supply at least 2 arguments"); |
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94 print_usage ("cellfun"); |
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95 return retval; |
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96 } |
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97 |
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98 if (args(0).is_function_handle () || args(0).is_inline_function ()) |
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99 { |
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100 func = args(0).function_value (); |
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101 |
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102 if (error_state) |
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103 return retval; |
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104 } |
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105 else if (args(0).is_string ()) |
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106 name = args(0).string_value (); |
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107 else |
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108 { |
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109 error ("cellfun: first argument must be a string or function handle"); |
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110 return retval; |
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111 } |
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112 |
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113 if (! args(1).is_cell ()) |
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114 { |
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115 error ("cellfun: second argument must be a cell array"); |
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116 |
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117 return retval; |
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118 } |
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119 |
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120 Cell f_args = args(1).cell_value (); |
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121 |
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122 int k = f_args.numel (); |
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123 |
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124 if (name == "isempty") |
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125 { |
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126 boolNDArray result (f_args.dims ()); |
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127 for (int count = 0; count < k ; count++) |
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128 result(count) = f_args.elem(count).is_empty (); |
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129 retval = result; |
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130 } |
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131 else if (name == "islogical") |
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132 { |
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133 boolNDArray result (f_args.dims ()); |
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134 for (int count= 0; count < k ; count++) |
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135 result(count) = f_args.elem(count).is_bool_type (); |
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136 retval = result; |
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137 } |
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138 else if (name == "isreal") |
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139 { |
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140 boolNDArray result (f_args.dims ()); |
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141 for (int count= 0; count < k ; count++) |
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142 result(count) = f_args.elem(count).is_real_type (); |
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143 retval = result; |
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144 } |
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145 else if (name == "length") |
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146 { |
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147 NDArray result (f_args.dims ()); |
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148 for (int count= 0; count < k ; count++) |
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149 result(count) = static_cast<double> (f_args.elem(count).length ()); |
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150 retval = result; |
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151 } |
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152 else if (name == "ndims") |
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153 { |
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154 NDArray result (f_args.dims ()); |
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155 for (int count = 0; count < k ; count++) |
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156 result(count) = static_cast<double> (f_args.elem(count).ndims ()); |
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157 retval = result; |
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158 } |
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159 else if (name == "prodofsize") |
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160 { |
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161 NDArray result (f_args.dims ()); |
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162 for (int count = 0; count < k ; count++) |
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163 result(count) = static_cast<double> (f_args.elem(count).numel ()); |
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164 retval = result; |
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165 } |
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166 else if (name == "size") |
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167 { |
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168 if (nargin == 3) |
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169 { |
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170 int d = args(2).nint_value () - 1; |
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171 |
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172 if (d < 0) |
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173 error ("cellfun: third argument must be a postive integer"); |
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174 |
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175 if (!error_state) |
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176 { |
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177 NDArray result (f_args.dims ()); |
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178 for (int count = 0; count < k ; count++) |
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179 { |
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180 dim_vector dv = f_args.elem(count).dims (); |
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181 if (d < dv.length ()) |
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182 result(count) = static_cast<double> (dv(d)); |
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183 else |
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184 result(count) = 1.0; |
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185 } |
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186 retval = result; |
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187 } |
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188 } |
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189 else |
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190 error ("not enough arguments for `size'"); |
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191 } |
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192 else if (name == "isclass") |
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193 { |
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194 if (nargin == 3) |
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195 { |
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196 std::string class_name = args(2).string_value(); |
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197 boolNDArray result (f_args.dims ()); |
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198 for (int count = 0; count < k ; count++) |
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199 result(count) = (f_args.elem(count).class_name() == class_name); |
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200 |
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201 retval = result; |
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202 } |
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203 else |
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204 error ("not enough arguments for `isclass'"); |
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205 } |
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206 else |
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207 { |
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208 std::string fcn_name; |
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209 |
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210 if (! func) |
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211 { |
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212 fcn_name = unique_symbol_name ("__cellfun_fcn_"); |
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213 std::string fname = "function y = "; |
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214 fname.append (fcn_name); |
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215 fname.append ("(x) y = "); |
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216 func = extract_function (args(0), "cellfun", fcn_name, fname, |
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217 "; endfunction"); |
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218 } |
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219 |
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220 if (! func) |
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221 error ("unknown function"); |
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222 else |
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223 { |
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224 Cell result (f_args.dims ()); |
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225 |
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226 for (int count = 0; count < k ; count++) |
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227 { |
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228 octave_value_list tmp |
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229 = func->do_multi_index_op (1, f_args.elem (count)); |
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230 result(count) = tmp(0); |
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231 |
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232 if (error_state) |
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233 break; |
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234 } |
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235 |
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236 if (! error_state) |
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237 retval = result; |
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238 |
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239 if (! fcn_name.empty ()) |
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240 clear_function (fcn_name); |
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241 } |
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242 } |
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243 |
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244 return retval; |
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245 } |
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246 |
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247 DEFUN_DLD (num2cell, args, , |
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248 "-*- texinfo -*-\n\ |
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249 @deftypefn {Loadable Function} {@var{c} =} num2cell (@var{m})\n\ |
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250 @deftypefnx {Loadable Function} {@var{c} =} num2cell (@var{m}, @var{d})\n\ |
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251 Convert to matrix @var{m} into a cell array. If @var{d} is defined the\n\ |
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252 value @var{c} is of dimension 1 in this dimension and the elements of\n\ |
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253 @var{m} are placed in slices in @var{c}.\n\ |
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254 @seealso{mat2cell}\n\ |
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255 @end deftypefn") |
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256 { |
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257 int nargin = args.length(); |
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258 octave_value retval; |
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259 |
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260 if (nargin < 1 || nargin > 2) |
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261 print_usage ("num2cell"); |
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262 else |
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263 { |
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264 dim_vector dv = args(0).dims (); |
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265 Array<int> sings; |
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266 |
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267 if (nargin == 2) |
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268 { |
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269 ColumnVector dsings = ColumnVector (args(1).vector_value |
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270 (false, true)); |
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271 sings.resize (dsings.length()); |
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272 |
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273 if (!error_state) |
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274 for (int i = 0; i < dsings.length(); i++) |
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275 if (dsings(i) > dv.length() || dsings(i) < 1 || |
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276 D_NINT(dsings(i)) != dsings(i)) |
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277 { |
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278 error ("invalid dimension specified"); |
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279 break; |
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280 } |
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281 else |
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282 sings(i) = NINT(dsings(i)) - 1; |
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283 } |
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284 |
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285 if (! error_state) |
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286 { |
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287 Array<bool> idx_colon (dv.length()); |
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288 dim_vector new_dv (dv); |
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289 octave_value_list lst (new_dv.length(), octave_value()); |
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290 |
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291 for (int i = 0; i < dv.length(); i++) |
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292 { |
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293 idx_colon(i) = false; |
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294 for (int j = 0; j < sings.length(); j++) |
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295 { |
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296 if (sings(j) == i) |
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297 { |
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298 new_dv(i) = 1; |
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299 idx_colon(i) = true; |
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300 lst(i) = octave_value (octave_value::magic_colon_t); |
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301 break; |
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302 } |
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303 } |
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304 } |
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305 |
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306 Cell ret (new_dv); |
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307 octave_idx_type nel = new_dv.numel(); |
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308 octave_idx_type ntot = 1; |
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309 |
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310 for (int j = 0; j < new_dv.length()-1; j++) |
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311 ntot *= new_dv(j); |
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312 |
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313 for (octave_idx_type i = 0; i < nel; i++) |
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314 { |
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315 octave_idx_type n = ntot; |
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316 octave_idx_type ii = i; |
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317 for (int j = new_dv.length() - 1; j >= 0 ; j--) |
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318 { |
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319 if (! idx_colon(j)) |
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320 lst (j) = ii/n + 1; |
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321 ii = ii % n; |
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322 if (j != 0) |
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323 n /= new_dv(j-1); |
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324 } |
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325 ret(i) = args(0).do_index_op(lst, 0); |
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326 } |
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327 |
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328 retval = ret; |
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329 } |
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330 } |
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331 |
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332 return retval; |
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333 } |
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334 |
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335 /* |
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336 ;;; Local Variables: *** |
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337 ;;; mode: C++ *** |
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338 ;;; End: *** |
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339 */ |
