fftpack

An open-source Fortran library for mathematics, science and engineering (*in a way* just like scipy for python)

Double precision version of fftpack

A modernisation of the SLATEC library

C translation & wrapper of Fortran FFTPACK library with a few extras.

Initialize a workspace array for performing a cosine transform.

Initialize a workspace array for performing a complex-valued Fourier transform.

Lower-level ndarray wrappers for FFTPACK fast Fourier transform routines.

Initialize a double-precision floating-point workspace array for performing a quarter-wave sine transform.

Initialize a workspace array for performing a quarter-wave sine transform.

Lower-level ndarray wrappers for double-precision floating-point FFTPACK fast Fourier transform routines.

Compute the forward discrete Fourier transform (DFT) of a real-valued sequence.

Lower-level ndarray wrappers for generic FFTPACK fast Fourier transform routines.

FFTPACK routines for fast Fourier transforms on double-precision floating-point arrays.

Initialize a workspace array for performing a quarter-wave cosine transform.

Initialize a workspace array for performing a real-valued Fourier transform.

Initialize a workspace array for performing a sine transform.

Initialize a workspace array for performing a real-valued Fourier transform on a one-dimensional single-precision floating-point ndarray.

Compute the forward discrete Fourier transform (DFT) of a real-valued sequence.

Factorize a sequence length into a product of integers.

Factorize a sequence length into a product of integers and store the results in a double-precision floating-point array.