A pythonic wrapper around FFTW, the FFT library, presenting a unified interface for all the supported transforms.
Project description
pyFFTW is a pythonic wrapper around FFTW, the speedy FFT library. The ultimate aim is to present a unified interface for all the possible transforms that FFTW can perform.
The full documentation can be found here, and the source is on github.
Both the complex DFT and the real DFT are supported, as well as arbitrary axes of abitrary shaped and strided arrays, which makes it almost feature equivalent to standard and real FFT functions of numpy.fft (indeed, it supports the clongdouble dtype which numpy.fft does not).
Operating FFTW in multithreaded mode is supported.
The core interface is provided by a unified class, pyfftw.FFTW. This core interface can be accessed directly, or through a series of helper functions, provided by the pyfftw.builders module. These helper functions provide an interface similar to numpy.fft for ease of use.
In addition to using pyfftw.FFTW, a convenient series of functions are included through pyfftw.interfaces that make using pyfftw almost equivalent to numpy.fft or scipy.fftpack.
A comprehensive unittest suite can be found with the source on the github repository.
To build for windows from source, download the fftw dlls for your system and the header file from here (they’re in a zip file): http://www.fftw.org/install/windows.html and place them in the pyfftw directory. The files are libfftw3-3.dll, libfftw3l-3.dll, libfftw3f-3.dll and libfftw3.h.
Under linux, to build from source, the FFTW library must be installed already. This should probably work for OSX, though I’ve not tried it.
Numpy is a dependency for both.
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