FFT and Windowing

One common method used to attempt to get around the periodicity problem is windowing. 

		octave:1 > s = sinegen (500, 1, 1/75, 0, 1) ;
		octave:2 > plot (s)
		octave:3 > hold on
		octave:4 > plot (hanning (length (s)))
		octave:5 > plot (s' .* hanning (length (s)))
window.gif

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