I'm trying to plot this function. There is no syntaxis mistakes, but the graphic appears empty. (It is a bode diagram).
GH_num= [1 2 3];GH_den= [4 5 6 7 8];GH_w=[];for w=2*pi*logspace(-1,3,1000) GH_num_w=polyval(GH_num,w*j); GH_den_w=polyval(GH_den,w*j); GH_w=[GH_w,GH_num_w/GH_den_w];endmag = 20*log10(abs(GH_w));phase=rad2deg(angle(GH_w));fGH=figure;aGH=subplot(2,1,1,'Parent'fGH);bGH=subplot(2,1,2,'Parent'fGH);semilogx=(aGH,w/2/pi,mag)semilogx=(bGH,w/2/pi,phase)
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