Gennan Chen wrote:

Hi! all,

There are so many fft routines in Scipy/Numpy. Does anyone know which one should be used officially?

For maximum portability and speed, use numpy.dual.fft() and its friends. That will use the optimized functions in scipy.fftpack if it is available and numpy.fft otherwise. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco