Fast Fourier transform: Difference between revisions

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     (odd+T),odd-T←even×exp
     (odd+T),odd-T←even×exp
}
}
ifft←{(≢⍵)÷⍨+fft(+⍵)}
test←{⎕←'Error: ',⍕⌈/(10○⊢)(⍵-ifft fft ⍵)}
</source>
</source>
{{Works in|[[Dyalog APL]]}}
{{Works in|[[Dyalog APL]]}}
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