www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@abstractsos/todf1sos.m
function Hd2 = todf1sos(Hd); %TODF1SOS Convert to direct-form 1 sos. % Hd2 = TODF1SOS(Hd) converts discrete-time filter Hd to direct-form 1 % sos filter Hd2. % Copyright 1988-2002 The MathWorks, Inc. Hd2 = dfilt.df1sos(Hd.sosMatrix,Hd.ScaleValues);