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 ## Convert to descriptor state-space model.
20 ## Since it is impossible to call a function inside @NAME without any
21 ## argument of class NAME (except the constructor @NAME/NAME.m),
22 ## the "constructor" for dss models is located outside folder @ss.
24 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
25 ## Created: September 2010
28 function sys = dss (sys)
34 if (! isa (sys, "ss"))
38 a = __sys_data__ (sys);
40 sys = __set__ (sys, "e", eye (size (a)));