This directory contains Fortran code for the 2D NUFFT. dirft2d.f contains direct evaluation schemes for verification/testing. nufft2df90.f contains NUFFT routines of types 1,2,3 with dynamic F90 workspace allocation. nufft2df77.f contains NUFFT routines of types 1,2,3 with static F77 workspace allocation in the calling (driver) routine. next235.f contains a utility routine that finds a highly composite integer greater than a given number. IT IS THE SAME AS THE ROUTINE PROVIDED IN THE 1D LIBRARY. dfft.f contains a double precision FFT package from Netlib. IT IS THE SAME AS THE ROUTINE PROVIDED IN THE 1D LIBRARY. nufft2d_demof77.f contains a sample driver routine for the F77 versions of the codes. nufft2d_demof90.f contains the analogous driver for the F90 versions of the codes. ------------------------------------------------------------------ Simply compile nufft2d_demof90.f nufft2df90.f dirft2d.f dfft.f next235.f or nufft2d_demof77.f nufft2df77.f dirft2d.f dfft.f next235.f Release notes: c c NUFFT 1.2 : Jan 24, 2009. c First external release. c c NUFFT 1.3 : Nov 28, 2011. c Adjust parameters and constants for double/quad precision. c Add Matlab/Octave wrappers and mex files. c