o Eb @sdZddlmZmZmZmZmZmZmZm Z m Z m Z m Z m Z mZmZmZmZmZmZddlmZmZmZmZmZmZmZmZddlmZmZm Z ddl!m"Z"ddl#m$Z$m%Z%m&Z&m'Z'ddl(m)Z)m*Z*m+Z+m,Z,dd l-m.Z.m/Z/gd Z0dd l1m2Z2e2e3Z4[2d S) at ============================================== 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 )fftifftfft2ifft2fftnifftnrfftirfftrfft2irfft2rfftnirfftnhfftihffthfft2ihfft2hfftnihfftn)dctidctdstidstdctnidctndstnidstn)fhtifht fhtoffset) next_fast_len) set_backend skip_backendset_global_backendregister_backend)fftfreqrfftfreqfftshift ifftshift) set_workers get_workers)(rrrrrrrr r r r r rrrrrrr%r&r'r(rrrrrrrrrrrrr r!r"r#r*r)) PytestTesterN)5__doc__Z_basicrrrrrrrr r r r r rrrrrrZ_realtransformsrrrrrrrrZ_fftlogrrrZ_helperrZ_backendr r!r"r#Z numpy.fftr%r&r'r(Z_pocketfft.helperr)r*__all__Zscipy._lib._testutilsr+__name__testr0r04/usr/lib/python3/dist-packages/scipy/fft/__init__.pysPT(