petsc-3.13.6 2020-09-29

MatCreateFFT

Creates a matrix object that provides FFT via an external package

#include "petscmat.h" 
PetscErrorCode MatCreateFFT(MPI_Comm comm,PetscInt ndim,const PetscInt dim[],MatType mattype,Mat *A)

Collective

	comm	- MPI communicator
	ndim	- the ndim-dimensional transform
	dim	- array of size ndim, dim[i] contains the vector length in the i-dimension
	type	- package type, e.g., FFTW or MATSEQCUFFT

A -the matrix

-mat_fft_type -set FFT type fft or seqcufft

Note: this serves as a base class for all FFT marix classes, currently MATFFTW or MATSEQCUFFT

intermediate