Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / control-2.3.52 / @lti / subsasgn.m

diff --git a/octave_packages/control-2.3.52/@lti/subsasgn.m b/octave_packages/control-2.3.52/@lti/subsasgn.m
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+## Copyright (C) 2009, 2011   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 -*-
+## Subscripted assignment for LTI objects.
+## Used by Octave for "sys.property = value".
+
+## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
+## Created: October 2009
+## Version: 0.2
+
+function sys = subsasgn (sys, idx, val)
+
+  ## TODO: enable *more* stuff like sys.a(2, 1:3) = [4, 5, 6]
+  ## warning ("lti: subsasgn: do not use subsasgn for development");
+
+  switch (idx(1).type)
+    case "."
+      if (length (idx) == 1)
+        sys = set (sys, idx.subs, val);
+      else
+        prop = idx(1).subs;
+        sys = set (sys, prop, subsasgn (get (sys, prop), idx(2:end), val));
+      endif
+
+    otherwise
+      error ("lti: subsasgn: invalid subscripted assignment type");
+
+  endswitch
+
+endfunction
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