Module SciPy.​fftpack.​info

Discrete Fourier Transform algorithms

Fast Fourier Transforms:

fft --- FFT of arbitrary type periodic sequences ifft --- Inverse of fft fftn --- Multi-dimensional FFT ifftn --- Inverse of fftn fft2 --- Two-dimensional FFT ifft2 --- Inverse of fft2 rfft --- FFT of real periodic sequences irfft --- Inverse of rfft

Differential and pseudo-differential operators:

diff --- Differentiation and integration of periodic sequences tilbert --- Tilbert transform: cs_diff(x,h,h) itilbert --- Inverse Tilbert transform: sc_diff(x,h,h) hilbert --- Hilbert transform: cs_diff(x,inf,inf) ihilbert --- Inverse Hilbert transform: sc_diff(x,inf,inf) cs_diff --- cosh/sinh pseudo-derivative of periodic sequences sc_diff --- sinh/cosh pseudo-derivative of periodic sequences ss_diff --- sinh/sinh pseudo-derivative of periodic sequences cc_diff --- cosh/cosh pseudo-derivative of periodic sequences shift --- Shift periodic sequences

Helper functions:

fftshift --- Shift zero-frequency component to center of spectrum ifftshift --- Inverse of freqshift dftfreq --- DFT sample frequencies rfftfreq --- DFT sample frequencies (specific to rfft,irfft)

Extension modules:

_fftpack --- Provides functions zfft, drfft, zrfft, zfftnd,

destroy_*_cache

convolve --- Provides functions convolve, convolve_z,

init_convolution_kernel, destroy_convolve_cache