ex12_1 - hold on plot([w(1) .3948],[.707 .707],'r--',[.3948...

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% Example 12.1 % numd = 0.0302*[1 2 1]; dend = [1 -1.4514 .5724]; w = -pi:2*pi/300:pi; H = freqz(numd,dend,w); plot(w,abs(H)) axis([-pi pi 0 1]) title('Figure 12.6') ylabel('|Hd|') xlabel('\Omega') % The following adds text to the plot.
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Unformatted text preview: hold on plot([w(1) .3948],[.707 .707],'r--',[.3948 .3948],[0 .707],'r--') text(1,.7,'W','FontName','Symbol') text(1.15,.7,'c = 0.3948') hold off...
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