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%c52.m N=32;k=0:N-1; f=[ones(1,4) 0.5 zeros(1,23) 0.5 ones(1,3)]; Fr=fft(f); subplot(2,1,1),stem(k,f) xlabel('k');ylabel('fk'); subplot(2,1,2),stem(k,Fr) xlabel('r');ylabel('Fr');
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