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## 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 @acronym{LTI} objects.
## If no return argument @var{retsys} is specified, the modified @acronym{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", "inn", "inputn"}
sys.inname = __adjust_labels__ (val, m);
case {"outname", "outputname", "outn", "outputn"}
sys.outname = __adjust_labels__ (val, p);
case {"tsam", "ts"}
if (issample (val, -1))
sys.tsam = val;
## TODO: display hint for 'd2d' to resample model?
else
error ("lti: set: invalid sampling time");
endif
case {"ingroup", "inputgroup", "ing", "inputg"}
if (isstruct (val) && all (structfun (@is_group_idx, val)))
empty = structfun (@isempty, val);
fields = fieldnames (val);
sys.ingroup = rmfield (val, fields(empty));
else
error ("lti: set: property 'ingroup' requires a struct containing valid input indices");
endif
case {"outgroup", "outputgroup", "outg", "outputg"}
if (isstruct (val) && all (structfun (@is_group_idx, val)))
empty = structfun (@isempty, val);
fields = fieldnames (val);
sys.outgroup = rmfield (val, fields(empty));
else
error ("lti: set: property 'outgroup' requires a struct containing valid output indices");
endif
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
function bool = is_group_idx (idx)
bool = (isempty (idx) || (is_real_vector (idx) && all (idx > 0) && all (abs (fix (idx)) == idx)));
endfunction