www.gusucode.com > sigtools 工具箱matlab源码程序 > sigtools/@lwdfilt/@abstractfirlinphase/thistf.m
function [num,den] = thistf(Hd) %THISTF Convert to transfer function. % [NUM,DEN] = THISTF(Hd) converts discrete-time filter Hd to numerator and % denominator vectors. % % See also DFILT. % Author: Thomas A. Bryan % Copyright 1988-2004 The MathWorks, Inc. % This should be private num = Hd.Numerator; den = 1;