Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / control-2.3.52 / __remove_trailing_zeros__.m

diff --git a/octave_packages/control-2.3.52/__remove_trailing_zeros__.m b/octave_packages/control-2.3.52/__remove_trailing_zeros__.m
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+## Copyright (C) 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 -*-
+## Remove trailing zeros from a polynomial, except for polynomials
+## which are of length 1.  For internal use only.
+
+## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
+## Created: April 2012
+## Version: 0.1
+
+function p = __remove_trailing_zeros__ (p)
+
+  idx = find (p != 0);
+  
+  if (isempty (idx))
+    p = 0;
+  else
+    p = p(1 : idx(end));
+  endif
+
+endfunction