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 ## Block diagonal concatenation of two LTI models.
20 ## This file is part of the Model Abstraction Layer.
21 ## For internal use only.
23 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
24 ## Created: September 2009
27 function retlti = __lti_group__ (lti1, lti2)
31 retlti.inname = [lti1.inname;
34 retlti.outname = [lti1.outname;
37 if (lti1.tsam == lti2.tsam)
38 retlti.tsam = lti1.tsam;
39 elseif (lti1.tsam == -2)
40 retlti.tsam = lti2.tsam;
41 elseif (lti2.tsam == -2)
42 retlti.tsam = lti1.tsam;
43 elseif (lti1.tsam == -1 && lti2.tsam > 0)
44 retlti.tsam = lti2.tsam;
45 elseif (lti2.tsam == -1 && lti1.tsam > 0)
46 retlti.tsam = lti1.tsam;
48 error ("lti_group: systems must have identical sampling times");