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## Copyright (C) 2010-2014 Lukas F. Reichlin
##
## 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 -*-
## Less-than-or-equal-to operator for two quaternions.
## Used by Octave for "q1 <= q2".
## The ordering is lexicographic.
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: December 2013
## Version: 0.1
function bool = le (a, b)
if (nargin != 2)
error ("quaternion: le: this is a binary operator");
endif
bool = ! gt (a, b);
endfunction
%!test
%! a = quaternion (2, 3, 4, 5);
%! b = quaternion (2, -3, 4, 5);
%! assert (a <= b, false);
%! assert (b <= a, true);