1 ## Copyright (C) 2009, 2010, 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 ## @deftypefn {Function File} {[@var{a}, @var{b}, @var{c}, @var{d}, @var{tsam}] =} ssdata (@var{sys})
20 ## Access state-space model data.
21 ## Argument @var{sys} is not limited to state-space models.
22 ## If @var{sys} is not a state-space model, it is converted automatically.
27 ## Any type of LTI model.
33 ## State transition matrix (n-by-n).
35 ## Input matrix (n-by-m).
37 ## Measurement matrix (p-by-n).
39 ## Feedthrough matrix (p-by-m).
41 ## Sampling time in seconds. If @var{sys} is a continuous-time model,
42 ## a zero is returned.
46 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
47 ## Created: September 2009
50 function [a, b, c, d, tsam, scaled] = ssdata (sys)
52 if (! isa (sys, "ss"))
56 [a, b, c, d, e, ~, scaled] = __sys_data__ (sys);
58 [a, b, c, d, e] = __dss2ss__ (a, b, c, d, e);