www.gusucode.com > signal 案例源码程序 matlab代码 > signal/GroupDelayResponseOfAButterworthDigitalFilterExample.m
%% Group Delay Response of a Butterworth digitalFilter % Use |designfilt| to design a sixth-order Butterworth Filter with % normalized 3-dB frequency $0.2\pi$ rad/sample. Display its group delay % response. % Copyright 2015 The MathWorks, Inc. %% d = designfilt('lowpassiir','FilterOrder',6, ... 'HalfPowerFrequency',0.2,'DesignMethod','butter'); grpdelay(d)