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## Copyright (C) 2012 Alexander Barth <barth.alexander@gmail.com>
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {} {[@var{s}, @var{n}] =} reducce(@var{A}, @var{funred}, @var{funelem}, @var{dim})
## Reduce array using callback fundtions.
##
## Reduce array using the function FUNRED applied to all elements
## after the function FUNELEM was applied along dimension DIM.
## @end deftypefn
function [s,n] = reduce(self,funred,funelem,dim)
sz = size(self);
if nargin == 3
dim = find(sz ~= 1,1);
if isempty(dim)
dim = 1;
endif
endif
idx.type = '()';
nd = length(sz);
idx.subs = cell(1,nd);
for i=1:nd
idx.subs{i} = ':';
endfor
n = size(self,dim);
if n == 0
s = [];
else
idx.subs{dim} = 1;
s = funelem(subsref(self,idx));
for i=2:n
idx.subs{dim} = i;
s = funred(s,funelem(subsref(self,idx)));
endfor
endif
endfunction
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