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    function R=poly2ac(a,efinal)
%POLY2AC  Convert prediction polynomial to autocorrelation sequence.
%   R=POLY2AC(A,Efinal) returns the autocorrelation sequence, R, based on
%   the prediction polynomial, A, and the final prediction error, Efinal. 
%
%   If A(1) is not equal to 1, POLY2AC normalizes the prediction
%   polynomial by A(1).
%
%   See also AC2POLY, POLY2RC, RC2POLY, RC2AC, AC2RC.

%   References: S. Kay, Modern Spectral Estimation,
%               Prentice Hall, N.J., 1987, Chapter 6.
%
%   Author(s): A. Ramasubramanian
%   Copyright (c) 1988-98 by The MathWorks, Inc.
%   $Revision: 1.2 $  $Date: 1998/07/16 15:57:35 $

R = rlevinson(a,efinal);

% [EOF] poly2ac.m