Neffint is an acronym for Non-equidistant Filon Fourier integration. This is a python package for computing Fourier integrals using a method based on Filon's rule with non-equidistant grid spacing.
Neffint licensed under an Apache-2.0 license. See HERE or the LICENSE file for details.
Documentation for the package is hosted at: https://neffint.readthedocs.io/en/latest
A presentation about Neffint given @CERN-ABP-CEI meeting is available here.
The following is a brief explanation of the repository structure:
neffint/- root directory.github/workflows/- Continuous integration jobsexamples/- directory for examples of useneffint/- source code directory for the Python packagetests/- directory for code tests (pytest)LICENSE,README.md,.gitignore- Standard github repository filespyproject.toml,setup.py- Python packaging instructionsrelease.sh- PyPI publishing script
To install Neffint, simply run:
pip install neffint
The primary functionality of the package is the ability to compute Fourier integrals on non-equidistant frequency grids. The fourier_integral_fixed_sampling function is a good starting point for this. This takes in an array of frequencies and a corresponding array of function values, and performs the integration for a range of time values.
The improve_frequency_range and fourier_integral_adaptive functions allow improving an initial frequency grid adaptively, for more precise integration.
The notebooks in the examples/ folder give a more detailed introduction to using the package.
Neffint is an open source project, and as such, users should feel welcome to provide feedback or contribute to the code. Check out CONTRIBUTING.md for more details on how to contribute to the project.