这段matlab程序是什么意思?请详细说明每一句话,f=0.12810^(6)..f=0.12810^(6);amin=2(f-0.0410^(6))/fs;amax=2(f+0.0410^(6))/fs;[b,a]=butter(3,[amin,amax]);[h2,w2]=freqz(b2,a2);[b2,a2]=butter(5,0.004,'low');yd=filter(b,a,y);

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这段matlab程序是什么意思?请详细说明每一句话,f=0.128*10^(6)..
f=0.128*10^(6);
amin=2*(f-0.04*10^(6))/fs;
amax=2*(f+0.04*10^(6))/fs;
[b,a]=butter(3,[amin,amax]);
[h2,w2]=freqz(b2,a2);
[b2,a2]=butter(5,0.004,'low');
yd=filter(b,a,y);

是什么意思?请详

这段matlab程序是什么意思?请详细说明每一句话,f=0.128*10^(6)..f=0.128*10^(6);amin=2*(f-0.04*10^(6))/fs;amax=2*(f+0.04*10^(6))/fs;[b,a]=butter(3,[amin,amax]);[h2,w2]=freqz(b2,a2);[b2,a2]=butter(5,0.004,'low');yd=filter(b,a,y);

这段matlab程序是什么意思?请详细说明每一句话,f=0.12810^(6)..f=0.12810^(6);amin=2(f-0.0410^(6))/fs;amax=2(f+0.0410^(6))/fs;[b,a]=butter(3,[amin,amax]);[h2,w2]=freqz(b2,a2);[b2,a2]=butter(5,0.004,'low');yd=filter(b,a,y);