m2low.m

此程序能在MATLAB上实现低通滤波器

clf;
[z,p,k]=cheb2ap(8,25)
[b,a]=zp2tf(z,p,k)
[h,w]=freqs(b,a,n)
magh2=(abs(h)).^2
plot(w,(magh2))
xlabel('Frequency, Hz');ylabel('Gain, dB')
title('Gain Response of Chebyshev I Low-pass Filter')
axis([0 2 0 1])