PETSc version 3.17.0
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# DMGetRegionNumDS

Get the PetscDS for a given mesh region, defined by the region number

### Synopsis

    #include "petscdm.h"
    #include "petscdmlabel.h"
    #include "petscds.h"
    PetscErrorCode DMGetRegionNumDS(DM dm, PetscInt num, DMLabel *label, IS *fields, PetscDS *ds)

Not collective

### Input Parameters

| dm | - The DM
| num | - The region number, in [0, Nds)

### Output Parameters

| label | - The region label, or NULL
| fields | - The IS containing the DM field numbers for the fields in this DS, or NULL
| ds | - The PetscDS defined on the given region, or NULL

### See Also

DMGetRegionDS(), DMSetRegionDS(), DMGetDS(), DMGetCellDS()

### Level

advanced

### Location

src/dm/interface/dm.c
Index of all DM routines
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Index of all manual pages