""" ============================================== Discrete Fourier transforms (:mod:`scipy.fft`) ============================================== .. currentmodule:: scipy.fft Fast Fourier Transforms (FFTs) ============================== .. autosummary:: :toctree: generated/ fft - Fast (discrete) Fourier Transform (FFT) ifft - Inverse FFT fft2 - 2-D FFT ifft2 - 2-D inverse FFT fftn - N-D FFT ifftn - N-D inverse FFT rfft - FFT of strictly real-valued sequence irfft - Inverse of rfft rfft2 - 2-D FFT of real sequence irfft2 - Inverse of rfft2 rfftn - N-D FFT of real sequence irfftn - Inverse of rfftn hfft - FFT of a Hermitian sequence (real spectrum) ihfft - Inverse of hfft hfft2 - 2-D FFT of a Hermitian sequence ihfft2 - Inverse of hfft2 hfftn - N-D FFT of a Hermitian sequence ihfftn - Inverse of hfftn Discrete Sin and Cosine Transforms (DST and DCT) ================================================ .. autosummary:: :toctree: generated/ dct - Discrete cosine transform idct - Inverse discrete cosine transform dctn - N-D Discrete cosine transform idctn - N-D Inverse discrete cosine transform dst - Discrete sine transform idst - Inverse discrete sine transform dstn - N-D Discrete sine transform idstn - N-D Inverse discrete sine transform Fast Hankel Transforms ====================== .. autosummary:: :toctree: generated/ fht - Fast Hankel transform ifht - Inverse of fht Helper functions ================ .. autosummary:: :toctree: generated/ fftshift - Shift the zero-frequency component to the center of the spectrum ifftshift - The inverse of `fftshift` fftfreq - Return the Discrete Fourier Transform sample frequencies rfftfreq - DFT sample frequencies (for usage with rfft, irfft) fhtoffset - Compute an optimal offset for the Fast Hankel Transform next_fast_len - Find the optimal length to zero-pad an FFT for speed set_workers - Context manager to set default number of workers get_workers - Get the current default number of workers Backend control =============== .. autosummary:: :toctree: generated/ set_backend - Context manager to set the backend within a fixed scope skip_backend - Context manager to skip a backend within a fixed scope set_global_backend - Sets the global fft backend register_backend - Register a backend for permanent use """ from ._basic import ( fft, ifft, fft2, ifft2, fftn, ifftn, rfft, irfft, rfft2, irfft2, rfftn, irfftn, hfft, ihfft, hfft2, ihfft2, hfftn, ihfftn) from ._realtransforms import dct, idct, dst, idst, dctn, idctn, dstn, idstn from ._fftlog import fht, ifht, fhtoffset from ._helper import next_fast_len, fftfreq, rfftfreq, fftshift, ifftshift from ._backend import (set_backend, skip_backend, set_global_backend, register_backend) from ._pocketfft.helper import set_workers, get_workers __all__ = [ 'fft', 'ifft', 'fft2', 'ifft2', 'fftn', 'ifftn', 'rfft', 'irfft', 'rfft2', 'irfft2', 'rfftn', 'irfftn', 'hfft', 'ihfft', 'hfft2', 'ihfft2', 'hfftn', 'ihfftn', 'fftfreq', 'rfftfreq', 'fftshift', 'ifftshift', 'next_fast_len', 'dct', 'idct', 'dst', 'idst', 'dctn', 'idctn', 'dstn', 'idstn', 'fht', 'ifht', 'fhtoffset', 'set_backend', 'skip_backend', 'set_global_backend', 'register_backend', 'get_workers', 'set_workers'] from scipy._lib._testutils import PytestTester test = PytestTester(__name__) del PytestTester