1 ## Copyright (C) 2009, 2011 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 ## Horizontal concatenation of LTI objects. If necessary, object conversion
20 ## is done by sys_group. Used by Octave for "[sys1, sys2]".
22 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
23 ## Created: September 2009
26 function sys = horzcat (sys, varargin)
28 for k = 1 : (nargin-1)
33 [p1, m1] = size (sys1);
34 [p2, m2] = size (sys2);
37 error ("lti: horzcat: number of system outputs incompatible: [(%dx%d), (%dx%d)]",
41 sys = __sys_group__ (sys1, sys2);
43 out_scl = [eye(p1), eye(p2)];
52 ## Rowwise concatenation of two systems in state-space form
53 ## Test from SLICOT AB05OD
55 %! A1 = [ 1.0 0.0 -1.0
62 %! C1 = [ 3.0 -2.0 1.0
72 %! B2 = [ 0.0 -1.0 0.0
81 %! sys1 = ss (A1, B1, C1, D1);
82 %! sys2 = ss (A2, B2, C2, D2);
83 %! sys = [sys1, sys2];
84 %! [A, B, C, D] = ssdata (sys);
87 %! Ae = [ 1.0000 0.0000 -1.0000 0.0000 0.0000 0.0000
88 %! 0.0000 -1.0000 1.0000 0.0000 0.0000 0.0000
89 %! 1.0000 1.0000 2.0000 0.0000 0.0000 0.0000
90 %! 0.0000 0.0000 0.0000 -3.0000 0.0000 0.0000
91 %! 0.0000 0.0000 0.0000 1.0000 0.0000 1.0000
92 %! 0.0000 0.0000 0.0000 0.0000 -1.0000 2.0000 ];
94 %! Be = [ 1.0000 2.0000 0.0000 0.0000
95 %! 1.0000 0.0000 0.0000 0.0000
96 %! 0.0000 1.0000 0.0000 0.0000
97 %! 0.0000 0.0000 0.0000 1.0000
98 %! 0.0000 0.0000 -1.0000 0.0000
99 %! 0.0000 0.0000 0.0000 2.0000 ];
101 %! Ce = [ 3.0000 -2.0000 1.0000 1.0000 1.0000 0.0000
102 %! 0.0000 1.0000 0.0000 1.0000 1.0000 -1.0000 ];
104 %! De = [ 1.0000 0.0000 1.0000 1.0000
105 %! 0.0000 1.0000 0.0000 1.0000 ];
107 %! Me = [Ae, Be; Ce, De];
109 %!assert (M, Me, 1e-4);