petsc-3.13.6 2020-09-29

MatCreateSeqUSFFT

Creates a matrix object that provides sequential USFFT via the external package FFTW

#include "petscmat.h" 
#include "petscdmda.h"  
PetscErrorCode  MatCreateSeqUSFFT(Vec sampleCoords, DMDA freqDA, Mat *A)

Collective

da -geometry of the domain encoded by a DMDA

A -the matrix

-mat_usfft_plannerflags -set the FFTW planner flags

intermediate