Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / control-2.3.52 / @ss / __sys_prune__.m

diff --git a/octave_packages/control-2.3.52/@ss/__sys_prune__.m b/octave_packages/control-2.3.52/@ss/__sys_prune__.m
new file mode 100644 (file)
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+++ b/octave_packages/control-2.3.52/@ss/__sys_prune__.m
@@ -0,0 +1,42 @@
+## Copyright (C) 2009, 2010   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 -*-
+## Submodel extraction and reordering for SS objects.
+## This file is part of the Model Abstraction Layer.
+## For internal use only.
+
+## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
+## Created: September 2009
+## Version: 0.2
+
+function sys = __sys_prune__ (sys, out_idx, in_idx, st_idx = ":")
+
+  sys.lti = __lti_prune__ (sys.lti, out_idx, in_idx);
+
+  sys.a = sys.a(st_idx, st_idx);
+  sys.b = sys.b(st_idx, in_idx);
+  sys.c = sys.c(out_idx, st_idx);
+  sys.d = sys.d(out_idx, in_idx);
+
+  if (! isempty (sys.e))
+    sys.e = sys.e(st_idx, st_idx);
+  endif
+
+  sys.stname = sys.stname(st_idx);
+
+endfunction
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