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1 ## Copyright (C) 2006 Bill Denney <denney@seas.upenn.edu> |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {@var{a} =} arrayfun (@var{name}, @var{c}) |
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21 ## @deftypefnx {Function File} {@var{a} =} arrayfun (@var{func}, @var{c}) |
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22 ## @deftypefnx {Function File} {@var{a} =} arrayfun (@var{func}, @var{c}, @var{d}) |
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23 ## @deftypefnx {Function File} {@var{a} =} arrayfun (@var{func}, @var{c}, @var{options}) |
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24 ## @deftypefnx {Function File} {[@var{a}, @var{b}, @dots{}] =} arrayfun (@var{func}, @var{c}, @dots{}) |
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25 ## Execute a function on each element of an array. This is useful for |
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26 ## functions that do not accept array arguments. If the function does |
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27 ## accept array arguments it is better to call the function directly. |
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28 ## |
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29 ## See @code{cellfun} for complete usage instructions. |
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30 ## @seealso{cellfun} |
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31 ## @end deftypefn |
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32 |
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33 function varargout = arrayfun (func, varargin) |
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34 |
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35 if (nargin < 2) |
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36 print_usage (); |
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37 endif |
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38 |
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39 ## Convert everything to cells and call cellfun (let cellfun error |
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40 ## check the options in case more options come available). |
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41 sizetomatch = size (varargin{1}); |
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42 m2cargs{1} = ones (size (varargin{1}, 1), 1); |
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43 m2cargs{2} = ones (size (varargin{1}, 2), 1); |
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44 cfarg{1} = mat2cell (varargin{1}, m2cargs{:}); |
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45 stillmatches = true; |
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46 idx = 1; |
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47 while (stillmatches && idx < numel (varargin)) |
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48 idx++; |
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49 thissize = size (varargin{idx}); |
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50 if (numel (thissize) == numel (sizetomatch) |
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51 && all (thissize == sizetomatch)) |
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52 if (ischar (varargin{idx}) |
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53 && (strcmpi (varargin{idx}, "UniformOutput") |
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54 || strcmpi (varargin{idx}, "ErrorHandler"))) |
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55 ## Catch these strings just in case they happen to be the same |
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56 ## size as the other input. |
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57 stillmatches = false; |
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58 else |
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59 cfarg{idx} = mat2cell (varargin{idx}, m2cargs{:}); |
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60 endif |
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61 else |
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62 stillmatches = false; |
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63 endif |
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64 endwhile |
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65 |
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66 varargout = cell (max ([nargout, 1]), 1); |
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67 [varargout{:}] = cellfun (func, cfarg{:}, varargin{idx+1:numel(varargin)}); |
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68 endfunction |
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69 |
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70 %!test |
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71 %! fun = @(x,y) 2*x+y; |
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72 %! A = [1,2;3,4]; |
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73 %! assert(arrayfun(fun,A,A),fun(A,A)) |
