petsc-3.14.6 2021-03-30

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

- geometry of the domain encoded by a DMDA

- the matrix

-mat_usfft_plannerflags

- set the FFTW planner flags

intermediate