www.gusucode.com > 时间序列分析工具箱 - tsa源码程序 > tsa/rc2poly.m
function [a,efinal] = rc2poly(RC,E); % converts reflection coefficients into an AR-polynomial % [a,efinal] = rc2poly(K) % % see also ACOVF ACORF AR2RC RC2AR DURLEV AC2POLY, POLY2RC, RC2POLY, RC2AC, AC2RC, POLY2AC % % Version 2.90 last revision 10.04.2002 % Copyright (C) 1996-2002 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 nargout>1 & nargin<2 fprintf('Zero-lag autocorrelation, R0 not specified\n') return; end; mfilename='RC2POLY'; if all(size(RC))>1, fprintf(2,'Error %s: "K" must be a vector\n',mfilename); return; end; if ~exist('rc2ar','file') fprintf(2,'Error %s: RC2AR.M not found. \n Download TSA toolbox from http://www.dpmi.tu-graz.ac.at/~schloegl/matlab/tsa/\n',mfilename); return; end; [AR,RC,PE] = rc2ar(RC(:).'); a=[1,-AR]; efinal=PE(length(PE))/PE(1);