function fft
Calculates the fast fourier transform of X. If X is real, the forward transform is computed. If X is complex, the inverse transform is computed.
Syntax
result = fft(X)
Arguments
| X: | A matrix. |
Notes
The fft function uses the FFTW (Fastest Fourier Transform in the West) library, which is not limited to any array size. Still, computing a fft is fastest for arrays of size 2^N (N being an integer number).