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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 program is free software; you can redistribute it and/or modify |
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4 ## it under the terms of the GNU General Public License as published by |
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5 ## the Free Software Foundation; either version 2 of the License, or |
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6 ## (at your option) any later version. |
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7 ## |
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8 ## This program is distributed in the hope that it will be useful, |
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9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 ## GNU General Public License for more details. |
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12 ## |
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13 ## You should have received a copy of the GNU General Public License |
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14 ## along with this program; if not, write to the Free Software |
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15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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16 |
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17 ## -*- texinfo -*- |
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18 ## @deftypefn {Command} @var{a} = arrayfun(@var{name}, @var{c}) |
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19 ## @deftypefnx {Command} @var{a} = arrayfun(@var{func}, @var{c}) |
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20 ## @deftypefnx {Command} @var{a} = arrayfun(@var{func}, @var{c}, @var{d}) |
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21 ## @deftypefnx {Command} @var{a} = arrayfun(@var{func}, @var{c}, @var{options}) |
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22 ## @deftypefnx {Command} [@var{a}, @var{b}, @dots{}] = arrayfun(@var{func}, @var{c}, @dots{}) |
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23 ## Execute a function on each element of an array. This is useful for |
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24 ## functions that do not accept array arguments. If the function does |
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25 ## accept array arguments it is better to call the function directly. |
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26 ## |
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27 ## See @code{cellfun} for complete usage instructions. |
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28 ## @seealso{cellfun} |
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29 ## @end deftypefn |
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30 |
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31 function [varargout] = arrayfun(func, varargin) |
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32 |
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33 if (nargin < 2) |
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34 print_usage(); |
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35 endif |
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36 |
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37 ## convert everything to cells and call cellfun (let cellfun error |
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38 ## check the options in case more options come available) |
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39 sizetomatch = size(varargin{1}); |
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40 m2cargs{1} = ones (size (varargin{1}, 1), 1); |
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41 m2cargs{2} = ones (size (varargin{1}, 2), 1); |
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42 cfarg{1} = mat2cell (varargin{1}, m2cargs{:}); |
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43 stillmatches = true; |
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44 idx = 1; |
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45 while stillmatches && (idx < length(varargin)) |
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46 idx++; |
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47 thissize = size (varargin{idx}); |
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48 if (length (thissize) == length (sizetomatch)) && \ |
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49 all (thissize == sizetomatch) |
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50 if ischar (varargin{idx}) && \ |
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51 (strcmpi (varargin{idx}, "UniformOutput") || \ |
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52 strcmpi (varargin{idx}, "ErrorHandler")) |
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53 ## catch these strings just in case they happen to be the same |
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54 ## size as the other input. |
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55 stillmatches = false; |
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56 else |
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57 cfarg{idx} = mat2cell (varargin{idx}, m2cargs{:}); |
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58 endif |
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59 else |
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60 stillmatches = false; |
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61 endif |
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62 endwhile |
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63 |
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64 varargout = cell (max ([nargout, 1]), 1); |
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65 [varargout{:}] = cellfun (func, cfarg{:}, varargin{idx+1:length(varargin)}); |
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66 endfunction |
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67 |
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68 %!test |
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69 %! fun = @(x,y) 2*x+y |
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70 %! A = [1,2;3,4]; |
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71 %! assert(arrayfun(fun,A,A),fun(A,A)) |
