小白求教MATLAB问题啊k=300;num[0.0518,-0.1553,0.1553,0.0518];den[1,1.2828,1.0388,0.3418];w=0:pi/k:pi;h=freqz(num,den,w);subplot(2,2,1);plot(w/pi,real(h));gridtitle('实部')xlable('\omega/\pi');ylable('幅度');subplot(2,2,2);plot(w/pi,imag(h))

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