#include "petscmat.h" #include "petscda.h" PetscErrorCode PETSCMAT_DLLEXPORT MatCreateSeqUSFFT(Vec sampleCoords, DA freqDA, Mat* A)Collective on MPI_Comm
| da | - geometry of the domain encoded by a DA | |
| A | - the matrix |
| -mat_usfft_plannerflags | - set the FFTW planner flags |