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Current File : /lib/python3/dist-packages/scipy/fftpack/__pycache__/__init__.cpython-311.pyc
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=========================================================
Legacy discrete Fourier transforms (:mod:`scipy.fftpack`)
=========================================================

.. warning::

   This submodule is now considered legacy, new code should use
   :mod:`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
   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

Differential and pseudo-differential operators
==============================================

.. autosummary::
   :toctree: generated/

   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
================

.. 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)
   next_fast_len - Find the optimal length to zero-pad an FFT for speed

Note that ``fftshift``, ``ifftshift`` and ``fftfreq`` are numpy functions
exposed by ``fftpack``; importing them from ``numpy`` should be preferred.

Convolutions (:mod:`scipy.fftpack.convolve`)
============================================

.. module:: scipy.fftpack.convolve

.. autosummary::
   :toctree: generated/

   convolve
   convolve_z
   init_convolution_kernel
   destroy_convolve_cache

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