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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <string> |
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28 |
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29 #include "lo-mappers.h" |
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30 |
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31 #include "Cell.h" |
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32 #include "defun-dld.h" |
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33 #include "parse.h" |
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34 #include "variables.h" |
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35 |
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36 DEFUN_DLD (cellfun, args, , |
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37 " -*- texinfo -*-\n\ |
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38 @deftypefn {Lodable Function} {} cellfun (@var{name}, @var{c})\n\ |
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39 @deftypefnx {Lodable Function} {} cellfun (\"isclass\", @var{c}, @var{class})\n\ |
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40 @deftypefnx {Lodable Function} {} cellfun (\"size\", @var{c}, @var{k})\n\ |
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41 @deftypefnx {Lodable Function} {} cellfun (@var{func}, @var{c})\n\ |
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42 \n\ |
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43 Evaluate the function named @var{name} on the elements of the cell array\n\ |
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44 @var{c}. Elements in cell_array are passed on to the named function\n\ |
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45 individually. The function @var{name} can be one of the functions\n\ |
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46 \n\ |
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47 @table @code\n\ |
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48 @item isempty\n\ |
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49 Return 1 when for non empty elements and 0 for others.\n\ |
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50 @item islogical\n\ |
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51 Return 1 for logical elements.\n\ |
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52 @item isreal\n\ |
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53 Return 1 for real elements.\n\ |
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54 @item length\n\ |
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55 Return a vector of the lengths of cell elements.\n\ |
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56 @item dims\n\ |
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57 Return the number of dimensions of each element.\n\ |
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58 @item prodofsize\n\ |
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59 Return the product of dimensions of each element.\n\ |
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60 @item size\n\ |
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61 Return the size along the @var{k}-th dimension.\n\ |
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62 @item isclass\n\ |
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63 Return 1 for elements of @var{class}.\n\ |
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64 @end table\n\ |
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65 \n\ |
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66 Additionally, @code{cellfun} accepts an arbitrary function @var{func}\n\ |
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67 in the form of an inline function, function handle, or the name of a\n\ |
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68 function (in a character string). The function should take a single\n\ |
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69 argument and return a single value, and in the case of a character string\n\ |
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70 argument, the argument must be named @var{x}. For example\n\ |
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71 \n\ |
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72 @example\n\ |
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73 @group\n\ |
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74 cellfun (\"tolower(x)\", @{\"Foo\", \"Bar\", \"FooBar\"@})\n\ |
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75 @result{} ans = @{\"foo\", \"bar\", \"foobar\"@}\n\ |
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76 @end group\n\ |
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77 @end example\n\ |
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78 \n\ |
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79 @end deftypefn") |
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80 { |
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81 octave_value retval; |
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82 |
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83 std::string name = "function"; |
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84 |
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85 octave_function *func = 0; |
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86 |
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87 int nargin = args.length (); |
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88 |
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89 if (nargin < 2) |
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90 { |
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91 error ("cellfun: you must supply at least 2 arguments"); |
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92 print_usage ("cellfun"); |
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93 return retval; |
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94 } |
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95 |
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96 if (args(0).is_function_handle () || args(0).is_inline_function ()) |
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97 { |
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98 func = args(0).function_value (); |
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99 |
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100 if (error_state) |
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101 return retval; |
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102 } |
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103 else if (args(0).is_string ()) |
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104 name = args(0).string_value (); |
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105 else |
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106 { |
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107 error ("cellfun: first argument must be a string"); |
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108 return retval; |
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109 } |
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110 |
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111 if (! args(1).is_cell ()) |
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112 { |
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113 error ("cellfun: second argument must be a cell"); |
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114 |
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115 return retval; |
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116 } |
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117 |
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118 Cell f_args = args(1).cell_value (); |
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119 |
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120 int k = f_args.numel (); |
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121 |
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122 if (name == "isempty") |
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123 { |
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124 boolNDArray result (f_args.dims ()); |
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125 for (int count = 0; count < k ; count++) |
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126 result(count) = f_args.elem(count).is_empty(); |
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127 retval = result; |
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128 } |
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129 else if (name == "islogical") |
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130 { |
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131 boolNDArray result (f_args.dims ()); |
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132 for (int count= 0; count < k ; count++) |
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133 result(count) = f_args.elem(count).is_bool_type (); |
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134 retval = result; |
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135 } |
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136 else if (name == "isreal") |
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137 { |
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138 boolNDArray result (f_args.dims ()); |
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139 for (int count= 0; count < k ; count++) |
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140 result(count) = f_args.elem(count).is_real_type (); |
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141 retval = result; |
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142 } |
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143 else if (name == "length") |
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144 { |
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145 NDArray result (f_args.dims ()); |
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146 for (int count= 0; count < k ; count++) |
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147 result(count) = double (f_args.elem(count).numel ()); |
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148 retval = result; |
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149 } |
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150 else if (name == "ndims") |
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151 { |
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152 NDArray result (f_args.dims ()); |
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153 for (int count = 0; count < k ; count++) |
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154 result(count) = double ((f_args.elem(count).dims ()).numel ()); |
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155 retval = result; |
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156 } |
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157 else if (name == "prodofsize") |
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158 { |
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159 NDArray result (f_args.dims ()); |
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160 for (int count = 0; count < k ; count++) |
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161 result(count) = double ((f_args.elem(count).dims ()).numel ()); |
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162 retval = result; |
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163 } |
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164 else if (name == "size") |
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165 { |
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166 if (nargin == 3) |
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167 { |
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168 int d = args(2).nint_value () - 1; |
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169 |
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170 if (d < 0) |
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171 error ("cellfun: third argument must be a postive integer"); |
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172 |
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173 if (!error_state) |
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174 { |
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175 NDArray result (f_args.dims ()); |
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176 for (int count = 0; count < k ; count++) |
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177 { |
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178 dim_vector dv = f_args.elem(count).dims (); |
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179 if (d < dv.length ()) |
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180 result(count) = double (dv(d)); |
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181 else |
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182 result(count) = 1.0; |
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183 } |
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184 retval = result; |
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185 } |
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186 } |
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187 else |
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188 error ("Not enough argument for size"); |
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189 } |
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190 else if (name == "isclass") |
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191 { |
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192 if (nargin == 3) |
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193 { |
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194 std::string class_name = args(2).string_value(); |
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195 boolNDArray result (f_args.dims ()); |
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196 for (int count = 0; count < k ; count++) |
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197 result(count) = (f_args.elem(count).class_name() == class_name); |
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198 |
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199 retval = result; |
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200 } |
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201 else |
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202 error ("Not enough argument for isclass"); |
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203 } |
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204 else |
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205 { |
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206 std::string fcn_name; |
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207 |
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208 if (! func) |
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209 { |
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210 fcn_name = unique_symbol_name ("__cellfun_fcn_"); |
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211 std::string fname = "function y = "; |
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212 fname.append (fcn_name); |
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213 fname.append ("(x) y = "); |
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214 func = extract_function (args(0), "cellfun", fcn_name, fname, |
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215 "; endfunction"); |
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216 } |
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217 |
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218 if (! func) |
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219 error ("unknown function"); |
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220 else |
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221 { |
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222 Cell result (f_args.dims ()); |
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223 |
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224 for (int count = 0; count < k ; count++) |
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225 { |
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226 octave_value_list tmp |
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227 = func->do_multi_index_op (1, f_args.elem (count)); |
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228 result(count) = tmp(0); |
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229 |
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230 if (error_state) |
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231 break; |
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232 } |
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233 |
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234 if (! error_state) |
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235 retval = result; |
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236 |
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237 if (! fcn_name.empty ()) |
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238 clear_function (fcn_name); |
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239 } |
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240 } |
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241 |
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242 return retval; |
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243 } |
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244 |
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245 /* |
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246 ;;; Local Variables: *** |
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247 ;;; mode: C++ *** |
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248 ;;; End: *** |
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249 */ |
