www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/impzlength.m

    %IMPZLENGTH Length of the impulse response for a discrete-time filter.
%   IMPZLENGTH(Hd) returns the length of the impulse response of 
%   the filter defined by Hd.
%  
%   IMPZLENGTH(Hd,TOL) will specify the tolerance for greater or 
%   less accuracy.  By default, TOL = 5e-5.
%  
%   See also DFILT/IMPZ, DFILT/STEPZ.

%   Author: P. Costa, J. Schickler
%   Copyright 1988-2002 The MathWorks, Inc.

% Help for the p-coded IMPZLENGTH method of DFILT classes.