# DMGetMatrix

Gets empty Jacobian for a DA or DMComposite

### Synopsis

    #include "petscda.h"
    PetscErrorCode PETSCDM_DLLEXPORT DMGetMatrix(DM dm, MatType mtype,Mat *mat)

Collective on DM

### Input Parameter

| dm | - the DM object
| mtype | - Supported types are MATSEQAIJ, MATMPIAIJ, MATSEQBAIJ, MATMPIBAIJ, or any type which inherits from one of these (such as MATAIJ, MATLUSOL, etc.).

### Output Parameter

mat -the empty Jacobian

### See Also

DMDestroy(), DMView(), DMCreateGlobalVector(), DMGetInterpolation(), DMGetMatrix()

Level:developer
Location:src/dm/da/utils/dm.c
Index of all DA routines
Table of Contents for all manual pages
Index of all manual pages