PETSc version 3.17.4
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# DMStagMatGetValuesStencil

retrieve local matrix entries using grid indexing

### Synopsis

    PetscErrorCode DMStagMatGetValuesStencil(DM dm,Mat mat,PetscInt nRow,const DMStagStencil *posRow,PetscInt nCol,const DMStagStencil *posCol,PetscScalar *val)

Not Collective

### Input Parameters

| dm | - the DMStag object
| mat | - the matrix
| nRow | - number of rows
| posRow | - grid locations (including components) of rows
| nCol | - number of columns
| posCol | - grid locations (including components) of columns

### Output Parameter

| val | - logically two-dimensional array of values

### See Also

DMSTAG, DMStagStencil, DMStagStencilLocation, DMStagVecGetValuesStencil(), DMStagVecSetValuesStencil(), DMStagMatSetValuesStencil(), MatSetValuesStencil(), MatAssemblyBegin(), MatAssemblyEnd(), DMCreateMatrix()

### Level

advanced

### Location

src/dm/impls/stag/stagstencil.c
Index of all DMSTAG routines
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