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FFT(R)
This function generates the Discrete Fourier Transform of the range R using a Fast Fourier Transform algorithm. The length of the range must be a power of 2. FFT will produce the same results a DFT, but it is much faster ( time time, as opposed to time).
Parameters
R
A range
Example
Vector C1..C4 =
1.2,
3.4,
54.3,
0.34
FFT(C1..C4) =
59.24 0
-53.1 3.06
51.76 0
-53.1 -3.06