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view main/quaternion/inst/@quaternion/norm.m @ 9892:8ad402be2313 octave-forge
main/quaternion --> extra/quaternion-legacy, extra/quaternion_oo --> main/quaternion
author | paramaniac |
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date | Wed, 28 Mar 2012 03:16:58 +0000 |
parents | extra/quaternion_oo/inst/@quaternion/norm.m@8a965ff6c37b |
children |
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## Copyright (C) 2011 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 -*- ## @deftypefn {Function File} {@var{n} =} norm (@var{q}) ## Norm of a quaternion. ## @end deftypefn ## Author: Lukas Reichlin <lukas.reichlin@gmail.com> ## Created: November 2011 ## Version: 0.1 function n = norm (a) if (nargin != 1) print_usage (); endif if (! isscalar (a.w)) warning ("norm: use 'abs' to calculate the lengths of quaternion arrays"); error ("norm: only the 2-norm of scalar quaternions is implemented until now"); endif n = abs (a); endfunction