1 ## Copyright (C) 2009 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 ## @deftypefn {Function File} {@var{sys} =} xperm (@var{sys}, @var{st_idx})
20 ## Reorder states in state-space models.
23 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
24 ## Created: November 2009
27 function sys = xperm (sys, st_idx)
33 if (! is_real_vector (st_idx))
34 error ("xperm: second argument invalid");
37 if (! isa (sys, "ss"))
38 warning ("xperm: system not in state-space form");
42 sys = __sys_prune__ (sys, ":", ":", st_idx);