--- /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 -*-
+## @deftypefn {Function File} set (@var{sys})
+## @deftypefnx {Function File} set (@var{sys}, @var{"property"}, @var{value}, @dots{})
+## @deftypefnx {Function File} {@var{retsys} =} set (@var{sys}, @var{"property"}, @var{value}, @dots{})
+## Set or modify properties of LTI objects.
+## If no return argument @var{retsys} is specified, the modified LTI object is stored
+## in input argument @var{sys}. @command{set} can handle multiple properties in one call:
+## @code{set (sys, 'prop1', val1, 'prop2', val2, 'prop3', val3)}.
+## @code{set (sys)} prints a list of the object's property names.
+## @end deftypefn
+
+## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
+## Created: October 2009
+## Version: 0.4
+
+function retsys = set (sys, varargin)
+
+ if (nargin == 1) # set (sys), sys = set (sys)
+
+ [props, vals] = __property_names__ (sys);
+ nrows = numel (props);
+
+ str = strjust (strvcat (props), "right");
+ str = horzcat (repmat (" ", nrows, 1), str, repmat (": ", nrows, 1), strvcat (vals));
+
+ disp (str);
+
+ if (nargout != 0) # function sys = set (sys, varargin)
+ retsys = sys; # would lead to unwanted output when using
+ endif # set (sys)
+
+ else # set (sys, "prop1", val1, ...), sys = set (sys, "prop1", val1, ...)
+
+ if (rem (nargin-1, 2))
+ error ("lti: set: properties and values must come in pairs");
+ endif
+
+ [p, m] = size (sys);
+
+ for k = 1 : 2 : (nargin-1)
+ prop = lower (varargin{k});
+ val = varargin{k+1};
+
+ switch (prop)
+ case {"inname", "inputname"}
+ sys.inname = __adjust_labels__ (val, m);
+
+ case {"outname", "outputname"}
+ sys.outname = __adjust_labels__ (val, p);
+
+ case {"tsam", "ts"}
+ if (issample (val, -1))
+ sys.tsam = val;
+ warning ("lti: set: use the editing of property '%s' with caution", prop);
+ warning (" it may lead to corrupted models");
+ else
+ error ("lti: set: invalid sampling time");
+ endif
+ ## TODO: use of c2d, d2c and d2d if tsam changes?
+
+ case "name"
+ if (ischar (val))
+ sys.name = val;
+ else
+ error ("lti: set: property 'name' requires a string");
+ endif
+
+ case "notes"
+ if (iscellstr (val))
+ sys.notes = val;
+ elseif (ischar (val))
+ sys.notes = {val};
+ else
+ error ("lti: set: property 'notes' requires string or cell of strings");
+ endif
+
+ case "userdata"
+ sys.userdata = val;
+
+ otherwise
+ sys = __set__ (sys, prop, val);
+ endswitch
+ endfor
+
+ if (nargout == 0) # set (sys, "prop1", val1, ...)
+ assignin ("caller", inputname (1), sys);
+ else # sys = set (sys, "prop1", val1, ...)
+ retsys = sys;
+ endif
+
+ endif
+
+endfunction
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