www.gusucode.com > signal 工具箱matlab源码程序 > signal/+fspecs/@hbord/iirlinphase.m
function Hd = iirlinphase(this,varargin) %IIRLINPHASE IIR quasi linear phase digital filter design. % Copyright 2007 The MathWorks, Inc. Hd = design(this, 'iirlinphase', varargin{:}); h = getfmethod(Hd); if ishp(this), if isa(Hd,'mfilt.abstractmultirate'), error(message('signal:fspecs:hbord:iirlinphase:InvalidStructure')); end Hd = iirlp2hp(Hd,.5,.5); % Reset the contained FMETHOD. Hd.setfmethod(h); end