/usr/share/octave/packages/3.2/miscellaneous-1.0.11/nze.m is in octave-miscellaneous 1.0.11-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | ## 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 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@cs.uky.edu>
## 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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