www.gusucode.com > dsp 案例源码程序 matlab代码 > dsp/EstimatedFrequencyResponseOfFilterExample.m

    %% Frequency Response of the Filter
% This examples plot the frequency response of the filter using |freqz|.
% The filter can be a |dfilt| object or a System object(TM).

%% 
b = fir1(80,0.5,kaiser(81,8));
hd = dfilt.dffir(b);
freqz(hd);
%% 
% |freqz| also accepts multiple filters.
b = fir1(40,0.5,kaiser(41,6));
hd2 = dfilt.dffir(b);
h = [hd hd2];
freqz(h);