www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@basefilter/freqz.m
function varargout = freqz(Hb,varargin) %FREQZ Discrete-time filter frequency response. % % See also DFILT, SIGNAL/FREQZ. % Copyright 1988-2004 The MathWorks, Inc. if nargout, [h,w] = base_resp(Hb, 'computefreqz', varargin{:}); varargout = {h, w}; else, [Hb, opts] = freqzparse(Hb, varargin{:}); fvtool(Hb, 'freq', opts); end % [EOF]