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Hi Lisa, it should be the same:
t = 0:0.001:1-0.001; xn = cos(2*pi*100*t); w = hanning(length(xn)); x = xn'.*w; sc = 1/sum(w); xdft = fft(xn); xdft = xdft(1:length(xn)/2+1); y = sc*xdft; plot(abs(y));
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