Fast Fourier transform: Difference between revisions

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Grondilu (talk | contribs)
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Here is a user-space definition for good measure.
 
<lang Mathematica>fft[{x_}] := {N@lx}
fft[l__] :=
Join[#, #] &@fft@l[[1 ;; ;; 2]] +
Retrieved from "https://rosettacode.org/wiki/Fast_Fourier_transform"