1 ## Copyright (C) 2007, Muthiah Annamalai <muthiah.annamalai@mavs.uta.edu>
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Loadable Function} {@var{return_value} =} apply (@var{@@function_handle},@var{cell_array_of_args})
18 ## @deftypefnx {Loadable Function} {@var{return_value} =} apply (@var{@@function_handle})
19 ## Apply calls the function @var{function_handle} with the arguments of the cell
20 ## array @var{cell_array_of_args} which contains the actual arguments arg1,arg2,..., argn
21 ## to the function, in that order. Apply invokes the function as
22 ## @var{function_handle}(arg1, arg2, ... ,argn), where the arguments are
23 ## extracted from each elements of the 1-row cell array @var{cell_array_of_args}.
25 ## @emph{warning}: @code{apply} has been deprecated in favor of @code{arrayfun}
26 ## and @code{cellfun} for arrays and cells respectively. This function will be
27 ## removed from future versions of the 'miscellaneous' package".
29 ## Apply also works on array of function handles if
30 ## @var{function_handle} is passed as a cell array of a handles; in this
31 ## case apply, evaluates each function (using the handle) with the same
34 ## The cell-array argument is optional second argument, in the form
35 ## of a 1-row with multiple elements. The elements of the cell-array
36 ## form the actual arguments supplied when invoking the function @var{function_handle}.
38 ## The return value depends on the function invoked, and the validity of
42 ## z=apply(@@sqrt,cell([1,2; 3,4]));
43 ## z=apply(@@apply,cell(@@sqrt,cell([1,2; 3,4])));
44 ## apply(@@sum,cell([1,2,3,4]))
45 ## apply(@@max,cell([1,2,3,4]))
46 ## apply(@@min,cell([1,2,3,4]))
50 ## In first case, apply computes the sqrt of the matrix [1,2; 3,4];
51 ## The second example is meta-apply, using apply on itself.
52 ## The rest of the examples invoke sum, max, min respectively.
56 function rval=apply(fun_handle,cell_array)
58 persistent warned = false;
61 warning ("Octave:deprecated-function",
62 "apply has been deprecated, and will be removed in the future. Use `arrayfun' or `cellfun' instead.");
67 error("apply(): needs at least 1 argument, see usage");
70 for idx=1:length(fun_handle)
71 rval(idx)=feval(@feval,fun_handle{idx});
74 rval=feval(@feval,fun_handle);
77 elseif(!iscell(cell_array))
78 error("apply(): needs second argument, to be a cell-array");
83 for idx=1:length(fun_handle)
84 rval(idx)=feval(@feval,fun_handle{idx},cell_array{:});
89 rval=feval(@feval,fun_handle,cell_array{:});
92 %!assert(apply({@min, @max, @mean},{[1:10]}),[ 1.0000 ,10.0000 ,5.5000])
93 %!assert(apply(@min,{[1,2,3,4]}),1)
94 %!assert(apply(@dot,{[1,2],[3,4]}),11)
95 %!assert(apply(@min,{[1, 3]}),1)
96 %!assert(apply(@sum,{[1:10]}),55)
97 %!assert(apply(@sqrt,{[1,2; 3,4]}),sqrt([1,2;3,4]))
98 %!assert(apply(@apply,{@sqrt,{[1,2; 3,4]}}),sqrt([1,2;3,4]))
99 %!assert(apply(@sum,{[1,2,3,4]}),10)
100 %!assert(apply(@max,{[1,2,3,4]}),4)
101 %!assert(apply(@min,{[1,2,3,4]}),1)