Fast Fourier transform: Difference between revisions
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Here is a user-space definition for good measure. |
Here is a user-space definition for good measure. |
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<lang Mathematica>fft[{x_}] := {N@ |
<lang Mathematica>fft[{x_}] := {N@x} |
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fft[l__] := |
fft[l__] := |
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Join[#, #] &@fft@l[[1 ;; ;; 2]] + |
Join[#, #] &@fft@l[[1 ;; ;; 2]] + |
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