www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@basefilter/cascade.m
function Hd = cascade(varargin) %CASCADE Cascade filter objects. % Hd = cascade(Hd1, Hd2, ...) is equivalent to Hd=dfilt.cascade(Hd1,Hd2,...). % The block diagram of this cascade looks like: % x ---> Hd1 ---> Hd2 ---> ... ---> y % % See also DFILT. % Author: Thomas A. Bryan % Copyright 1988-2015 The MathWorks, Inc. multirate = false; for indx = 1:nargin for jndx = 1:length(varargin{indx}) if ~isempty(findstr('mfilt', class(varargin{indx}(jndx)))) multirate = true; break; end end if multirate break end end % Suppress MFILT deprecation warnings w = warning('off', 'dsp:mfilt:mfilt:Obsolete'); restoreWarn = onCleanup(@() warning(w)); if multirate Hd = mfilt.cascade(varargin{:}); else Hd = dfilt.cascade(varargin{:}); end