Nfft

Jul 20, 2023

Nonequispaced fast Fourier transform

NFFT is a software library, written in C, for computing non-equispaced fast Fourier transforms and related variations. It implements the following transforms

  1. Non-equispaced fast Fourier transform NFFT
    • forward transform NFFT, i.e. frequency to time/space domain
    • adjoint transform adjoint NFFT, i.e. time/space to frequency domain
  2. Generalisations
    • to arbitrary nodes in time and frequency domain NNFFT
    • to real-valued data, i.e. cosine transforms, NFCT, NFST
    • to the sphere S^2 NFSFT
    • to the rotation group NFSOFT
    • to the hyperbolic cross NSFFT
  3. Generalised inverse transformations based on iterative methods, e.g. CGNR/CGNE


Checkout these related ports:
  • Zn_poly - C library for polynomial arithmetic
  • Zimpl - Language to translate the LP models into .lp or .mps
  • Zegrapher - Software for plotting mathematical objects
  • Zarray - Dynamically typed N-D expression system based on xtensor
  • Z3 - Z3 Theorem Prover
  • Yices - SMT solver
  • Yacas - Yet Another Computer Algebra System
  • Xtensor - Multi-dimensional arrays with broadcasting and lazy computing
  • Xtensor-python - Python bindings for xtensor
  • Xtensor-io - Xtensor plugin to read/write images, audio files, numpy npz and HDF5
  • Xtensor-blas - BLAS extension to xtensor
  • Xspread - Spreadsheet program for X and terminals
  • Xppaut - Graphical tool for solving differential equations, etc
  • Xplot - X11 plotting package
  • Xlife++ - XLiFE++ eXtended Library of Finite Elements in C++