www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@multistage/iirxform.m
function [Ht,anum,aden] = iirxform(Ho,fun,varargin) %XFORM Frequency Transformations. % Author(s): J. Schickler % Copyright 1988-2005 The MathWorks, Inc. for n = 1:length(Ho.Stage), Ht(n) = feval(fun, Ho.Stage(n), varargin{:}); end % Call the transformation on a dummy filter to get the allpass coeffs [num,den,anum,aden] = feval(fun,1,1,varargin{:}); Ht = feval(str2func(class(Ho)),Ht(:)); % [EOF]