...matlab中如何从两个不同频的正弦信号之和分别滤出来两个单频信号...答:Wp=100/500; Ws=150/500; %low pass filter [n,Wn]=buttord(Wp, Ws,3, 40 );[b, a]=butter(n, Wn) ;y1=filter(b, a, x);subplot(3, 1, 2),plot(t, y1);Wp=150/500; Ws=100/500; %high pass filter [n,Wn]=buttord(Wp, Ws, 3, 40 );[b, a]=butter(n...