1 ## Copyright (C) 2010, 2011 Lukas F. Reichlin
3 ## This program is free software: you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation, either version 3 of the License, or
6 ## (at your option) any later version.
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
13 ## You should have received a copy of the GNU General Public License
14 ## along with this program. If not, see <http://www.gnu.org/licenses/>.
17 ## Display routine for quaternions. Used by Octave internally.
19 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
28 if (length (s) == 2 && all (s == 1)) # scalar quaternion
30 x = __num2str__ (q.x);
31 y = __num2str__ (q.y);
32 z = __num2str__ (q.z);
33 disp ([name, " = ", w, x, "i" y, "j", z, "k"]);
35 else # non-scalar quaternion
36 disp ([name, ".w ="]);
39 disp ([name, ".x ="]);
42 disp ([name, ".y ="]);
45 disp ([name, ".z ="]);
53 function str = __num2str__ (num)
61 str = [str, num2str(abs (num), 4)];