Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / signal-1.1.3 / ss2zp.m

diff --git a/octave_packages/signal-1.1.3/ss2zp.m b/octave_packages/signal-1.1.3/ss2zp.m
new file mode 100644 (file)
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+++ b/octave_packages/signal-1.1.3/ss2zp.m
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+## Copyright (C) 1994, 1996, 2000, 2004, 2005, 2006, 2007 Auburn University
+## Copyright (C) 2012 Lukas F. Reichlin <lukas.reichlin@gmail.com>
+##
+## This program 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.
+##
+## This program 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
+## this program; if not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {[@var{pol}, @var{zer}, @var{k}] =} ss2zp (@var{a}, @var{b}, @var{c}, @var{d})
+## Converts a state space representation to a set of poles and zeros;
+## @var{k} is a gain associated with the zeros.
+##
+## @end deftypefn
+
+## Author: David Clem
+
+function [z, p, k] = ss2zp (varargin)
+
+  if (nargin == 0)
+    print_usage ();
+  endif
+
+  [z, p, k] = zpkdata (ss (varargin{:}), "vector");
+
+endfunction