1 function [A,E] = ac2poly(acf);
2 % converts the autocorrelation sequence into an AR polynomial
3 % [A,Efinal] = ac2poly(r)
5 % see also ACOVF ACORF AR2RC RC2AR DURLEV AC2POLY, POLY2RC, RC2POLY, RC2AC, AC2RC, POLY2AC
8 % $Id: ac2poly.m 5090 2008-06-05 08:12:04Z schloegl $
9 % Copyright (C) 1998-2002,2008 by Alois Schloegl <a.schloegl@ieee.org>
11 % This program is free software: you can redistribute it and/or modify
12 % it under the terms of the GNU General Public License as published by
13 % the Free Software Foundation, either version 3 of the License, or
14 % (at your option) any later version.
16 % This program is distributed in the hope that it will be useful,
17 % but WITHOUT ANY WARRANTY; without even the implied warranty of
18 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 % GNU General Public License for more details.
21 % You should have received a copy of the GNU General Public License
22 % along with this program. If not, see <http://www.gnu.org/licenses/>.
26 fprintf(2,'Error AC2POLY: "r" must be a vector\n');
32 if ~exist('durlev','file')
33 fprintf(2,'Error %s: DURLEV.M not found. \n Download TSA toolbox from http://www.dpmi.tu-graz.ac.at/~schloegl/matlab/tsa/\n',mfilename);
37 [AR,RC,PE] = durlev(acf);
39 A = [ones(size(AR,1),1),-AR];