scipy.fftpack.fft — SciPy v1.11.4 Manual

scipy.fftpack.fft# scipy.fftpack.fft(x, n=None, axis=-1, overwrite_x=False)[source]# Return discrete Fourier transform of real or complex sequence. The returned complex array contains y(0), y(1),..., y(n-1), where y(j) = (x * exp(-2*pi*sqrt(-1)*j*np.arange(n)/n)).sum(). Parameters: xarray_likeArray to Fourier transform. nint, optionalLength of the Fourier transform. If n < x.shape[axis], x is trun