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## Copyright (C) 2010 VZLU Prague
##
## 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{Function File} {[@var{y}, @var{f}] = } nze (@var{x})
## Extract nonzero elements of @var{x}. Equivalent to @code{@var{x}(@var{x} != 0)}.
## Optionally, returns also linear indices.
## @end deftypefn
## Author: Etienne Grossmann <etienne@egdn.net>
## Author: Jaroslav Hajek <highegg@gmail.com>
function [y, f] = nze (x)
nz = x != 0;
y = x(nz);
if (nargout > 1)
f = find (nz);
endif
endfunction
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