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 ## Set or modify properties of TF objects.
21 ## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
22 ## Created: October 2009
25 function sys = __set__ (sys, prop, val)
27 switch (prop) # {<internal name>, <user name>}
29 num = __vec2tfpoly__ (val);
30 __tf_dim__ (num, sys.den);
34 den = __vec2tfpoly__ (val);
35 __tf_dim__ (sys.num, den);
38 case {"tfvar", "variable"}
42 error ("tf: set: invalid transfer function variable");
47 error ("tf: set: property 'inv' requires discrete-time system");
48 elseif (! isscalar (val))
49 error ("tf: set: property 'inv' must be a scalar logical");
51 sys.inv = logical (val);
55 error ("tf: set: invalid property name");