function [RC,r0] = poly2rc(a,efinal);% converts AR-polynomial into reflection coefficients% [RC,R0] = poly2rc(A [,Efinal])%%  INPUT:% A     AR polynomial, each row represents one polynomial% Efinal    is the final prediction error variance (default value 1)%%  OUTPUT% RC    reflection coefficients% R0    is the variance (autocovariance at lag=0) based on the %	prediction error%%% see also ACOVF ACORF AR2RC RC2AR DURLEV AC2POLY, POLY2RC, RC2POLY, RC2AC, AC2RC, POLY2AC% %	Version 2.91%	Copyright (C) 1996-2001 by Alois Schloegl <a.schloegl@ieee.org>% This library is free software; you can redistribute it and/or% modify it under the terms of the GNU Library General Public% License as published by the Free Software Foundation; either% Version 2 of the License, or (at your option) any later version.%% This library 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% Library General Public License for more details.%% You should have received a copy of the GNU Library General Public% License along with this library; if not, write to the% Free Software Foundation, Inc., 59 Temple Place - Suite 330,% Boston, MA  02111-1307, USA.if all(size(a))>1,        fprintf(2,'Error poly2rc: "a" must be a vector\n');        return;end;a=a(:).';mfilename='POLY2RC';if ~exist('ar2rc','file')        fprintf(2,'Error %s: AR2RC.M not found. \n Download TSA toolbox from http://www.dpmi.tu-graz.ac.at/~schloegl/matlab/tsa/\n',mfilename);        return;end;if nargin<2, efinal=1; end;[AR,RC,PE] = ar2rc(poly2ar(a));if nargout>1,	r0=efinal.*PE(:,1)./PE(:,size(PE,2));end;