Fast Fourier transform: Difference between revisions

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fft =: ] floop&.cube rou@#</lang>
 
Example (first row of result is sine, second row of result is fft of the first row):
 
<lang j> (**+)&.+. (,: fft) 1 o. 2p1*3r16 * i.16
6,962

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