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comparison scripts/general/arrayfun.m @ 6422:9b982dd07654

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[project @ 2007-03-20 21:26:12 by dbateman]
author dbateman
date Tue, 20 Mar 2007 21:26:13 +0000
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children a37c427ae9d1
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6421:cac156381f81 6422:9b982dd07654
1 ## Copyright (C) 2006 Bill Denney <denney@seas.upenn.edu>
2 ##
3 ## This program is free software; you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation; either version 2 of the License, or
6 ## (at your option) any later version.
7 ##
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
12 ##
13 ## You should have received a copy of the GNU General Public License
14 ## along with this program; if not, write to the Free Software
15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17 ## -*- texinfo -*-
18 ## @deftypefn {Command} @var{a} = arrayfun(@var{name}, @var{c})
19 ## @deftypefnx {Command} @var{a} = arrayfun(@var{func}, @var{c})
20 ## @deftypefnx {Command} @var{a} = arrayfun(@var{func}, @var{c}, @var{d})
21 ## @deftypefnx {Command} @var{a} = arrayfun(@var{func}, @var{c}, @var{options})
22 ## @deftypefnx {Command} [@var{a}, @var{b}, @dots{}] = arrayfun(@var{func}, @var{c}, @dots{})
23 ## Execute a function on each element of an array. This is useful for
24 ## functions that do not accept array arguments. If the function does
25 ## accept array arguments it is better to call the function directly.
26 ##
27 ## See @code{cellfun} for complete usage instructions.
28 ## @seealso{cellfun}
29 ## @end deftypefn
30
31 function [varargout] = arrayfun(func, varargin)
32
33 if (nargin < 2)
34 print_usage();
35 endif
36
37 ## convert everything to cells and call cellfun (let cellfun error
38 ## check the options in case more options come available)
39 sizetomatch = size(varargin{1});
40 m2cargs{1} = ones (size (varargin{1}, 1), 1);
41 m2cargs{2} = ones (size (varargin{1}, 2), 1);
42 cfarg{1} = mat2cell (varargin{1}, m2cargs{:});
43 stillmatches = true;
44 idx = 1;
45 while stillmatches && (idx < length(varargin))
46 idx++;
47 thissize = size (varargin{idx});
48 if (length (thissize) == length (sizetomatch)) && \
49 all (thissize == sizetomatch)
50 if ischar (varargin{idx}) && \
51 (strcmpi (varargin{idx}, "UniformOutput") || \
52 strcmpi (varargin{idx}, "ErrorHandler"))
53 ## catch these strings just in case they happen to be the same
54 ## size as the other input.
55 stillmatches = false;
56 else
57 cfarg{idx} = mat2cell (varargin{idx}, m2cargs{:});
58 endif
59 else
60 stillmatches = false;
61 endif
62 endwhile
63
64 varargout = cell (max ([nargout, 1]), 1);
65 [varargout{:}] = cellfun (func, cfarg{:}, varargin{idx+1:length(varargin)});
66 endfunction
67
68 %!test
69 %! fun = @(x,y) 2*x+y
70 %! A = [1,2;3,4];
71 %! assert(arrayfun(fun,A,A),fun(A,A))