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- x=[0:0.125*pi:4*pi];
- y=cos(x);
- z=fft(y);
- q=0*x;
- plot(x,y,x,z,x,q,'k');
- xtick=[0 1*pi 2*pi 3*pi 4*pi];
- set(gca,'xtick',xtick);
- set(gca,'XTickLabel',{'0';'pi';'2pi';'3pi';'4pi'})
- set(gca,'fontsize', 16);
- legend('cos(x)', ('fft(cos(x))'))
- axis([0 4*pi ])
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