petsc-3.7.3 2016-07-24
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# MatCreateFFT

Creates a matrix object that provides FFT via an external package

### Synopsis

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

Collective on MPI_Comm

### Input Parameter

| 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 FFTCU

### Output Parameter

A -the matrix

### Options Database Keys

| -mat_fft_type | - set FFT type

Level:intermediate
Location: src/mat/impls/fft/fft.c
Index of all Mat routines
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Index of all manual pages