--- /dev/null
+## Copyright (C) 2009, 2010, 2012 Lukas F. Reichlin
+##
+## This file is part of LTI Syncope.
+##
+## LTI Syncope is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## LTI Syncope is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with LTI Syncope. If not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## Access property values of TF objects.
+
+## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
+## Created: October 2009
+## Version: 0.3
+
+function val = __get__ (sys, prop)
+
+ switch (prop) # {<internal name>, <user name>}
+ case "num"
+ val = cellfun (@get, sys.num, "uniformoutput", false);
+
+ case "den"
+ val = cellfun (@get, sys.den, "uniformoutput", false);
+
+ case {"tfvar", "variable"}
+ val = sys.tfvar;
+
+ case "inv"
+ val = sys.inv;
+
+ otherwise
+ error ("tf: get: invalid property name");
+ endswitch
+
+endfunction