1 ## Copyright (C) 2009, 2012 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 ## Subscripted reference for LTI objects.
20 ## Used by Octave for "sys = sys(2:4, :)" or "val = sys.prop".
22 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
23 ## Created: September 2009
26 function a = subsref (a, s)
36 a = __sys_prune__ (a, idx{1}, idx{2});
37 elseif (numel (idx) == 1)
38 a = __freqresp__ (a, idx{1});
40 error ("lti: subsref: need one or two indices");
45 ## warning ("lti: subsref: do not use subsref for development");
47 error ("lti: subsref: invalid subscript type");
50 a = subsref (a, s(2:end));
58 %! G = (s+1)*s*5/(s+1)/(s^2+s+1);
59 %! a = G(1,1).num{1,1}(1);
60 %!assert (a, 5, 1e-4);