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## Copyright (C) 2003 Tomer Altman
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## Copyright (C) 2007 Muthiah Annamalai
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## This program is free software; you can redistribute it and/or
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## modify it under the terms of the GNU General Public
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## License as published by the Free Software Foundation;
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## either version 2, or (at your option) any later version.
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## This software is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied
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## warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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## PURPOSE. See the GNU General Public License for more
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## Copyright (C) 2003 Tomer Altman <taltman@lbl.gov>
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## Copyright (C) 2007 Muthiah Annamalai <muthiah.annamalai@mavs.uta.edu>
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## Copyright (C) 2012 Carnë Draug <carandraug+dev@gmail.com>
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## Copyright (C) 2012 Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
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## This program is free software; you can redistribute it and/or modify it under
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## the terms of the GNU General Public License as published by the Free Software
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## Foundation; either version 3 of the License, or (at your option) any later
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## This program is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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## You should have received a copy of the GNU General Public
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## License along with this software; see the file COPYING. If not,
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## see <http://www.gnu.org/licenses/>.
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## You should have received a copy of the GNU General Public License along with
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## this program; if not, see <http://www.gnu.org/licenses/>.
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## @deftypefn{Function File} {@var{result} = } map ( fun_handle, varargin )
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## usage: result = map ( FUN_HANDLE, ARG1, ... )
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## @deftypefn{Function File} {@var{result} =} map (@var{function}, @var{iterable}, @dots{})
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## Apply @var{function} to every item of @var{iterable} and return the results.
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## @code{map}, like Lisp's ( & numerous other language's ) function for
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## iterating the result of a function applied to each of the data
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## @seealso{reduce, match, apply}
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## @seealso{reduce, match}
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## Author: Tomer Altman
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## Keywords: map matrix cell
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## Maintainer: Tomer Altman
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## Created: November 15, 2003
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function return_type = map (fun_handle, data_struct, varargin)
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if (ischar (fun_handle))
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fun_handle = eval (strcat ("@", fun_handle));
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fstr = typeinfo (fun_handle);
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error ("Error: Cannot find function handle, or funtion doesnt exist");
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persistent warned = false;
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warning ("Octave:deprecated-function",
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"map has been deprecated, and will be removed in the future. Use `arrayfun' or `cellfun' instead.");
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error ("map: incorrect number of arguments; expecting at least two");
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elseif (strcmp (fstr, "function handle") == 0)
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error ("map: first argument is not a valid function handle");
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elseif (!(isnumeric (data_struct) || iscell (data_struct)))
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error ("map: second argument must be either a matrix or a cell object");
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[rows, cols] = size (data_struct);
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error ("second argument must be either a matrix or a cell object");
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if (isa (fun_handle, "function_handle"))
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elseif (ischar (fun_handle))
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fun_handle = str2func (fun_handle);
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error ("fun_handle must either be a function handle or the name of a function");
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if (iscell (data_struct))
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return_type = cell (rows, cols);
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return_type = zeros (rows, cols);
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otherdata = length (varargin);
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val = cell (1, otherdata+1);
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val {1} = data_struct {i, j};
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for idx = 2:otherdata+1
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val {idx} = varargin {idx-1}{i,j};
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return_type {i,j} = apply (fun_handle, val);
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return_type {i,j} = fun_handle (data_struct {i,j});
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val {1} = data_struct (i,j);
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for idx = 2:otherdata+1
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val {idx} = varargin {idx-1}(i,j);
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return_type (i, j) = apply (fun_handle, val);
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return_type (i, j) = fun_handle (data_struct (i, j));
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return_type = cellfun (fun_handle, data_struct,varargin{:});
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return_type = arrayfun (fun_handle, data_struct,varargin{:});
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%! assert(map(@min,[1 2 3 4 5],[5 4 3 2 1]), [1 2 3 2 1])
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%! assert(map(@min,rand(1,5),[0 0 0 0 0]), [0 0 0 0 0])
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%! assert(map(@(x,y) (sin(x).^2 + cos(y).^2),-pi:0.5:+pi,-pi:0.5:+pi),ones(1,13))
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%!assert(map(@min,[1 2 3 4 5],[5 4 3 2 1]), [1 2 3 2 1])
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%!assert(map(@min,rand(1,5),[0 0 0 0 0]), [0 0 0 0 0])
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%!assert(map(@(x,y) (sin(x).^2 + cos(y).^2),-pi:0.5:+pi,-pi:0.5:+pi),ones(1,13))
added
removed
inst/map.m
