1 ## Copyright (C) 2010 Lukas F. Reichlin
3 ## This file is part of LTI Syncope.
5 ## LTI Syncope is free software: you can redistribute it and/or modify
6 ## it under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation, either version 3 of the License, or
8 ## (at your option) any later version.
10 ## LTI Syncope is distributed in the hope that it will be useful,
11 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ## GNU General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with LTI Syncope. If not, see <http://www.gnu.org/licenses/>.
19 ## Transpose of LTI objects. Used by Octave for "sys.'".
20 ## Useful for dual problems, i.e. controllability and observability
21 ## or designing estimator gains with @command{lqr} and @command{place}.
23 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
24 ## Created: February 2010
27 function sys = transpose (sys)
29 if (nargin != 1) # prevent sys = transpose (sys1, sys2, sys3, ...)
30 error ("lti: transpose: this is an unary operator");
35 sys = __transpose__ (sys);
37 sys.inname = repmat ({""}, p, 1);
38 sys.outname = repmat ({""}, m, 1);