FFTL — Generalised FFTLog for Python¶
The FFTL package for Python contains a routine to calculate integral transforms of the type
for arbitrary kernels \(T\). It uses a generalisation of the FFTLog [2] method of Hamilton [1] to efficiently compute the transform on logarithmic input and output grids.
The package supports any array implementation such as Numpy, JAX, Torch, dask,
etc. as long as it provides a reasonable set of standard Array API functions
(e.g. log(), exp(), linspace(), etc.) and Fast Fourier Transforms
(fft.rfft() and fft.irfft()).
Besides the generalised FFTLog algorithm, the package also provides a number of standard integral transforms.
Installation¶
Install with pip:
pip install fftl
For development, it is recommended to clone the GitHub repository, and perform an editable pip installation.
The package only requires numpy and scipy.