PETSc version 3.17.4
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# MatRestoreLocalSubMatrix

Restores a reference to a submatrix specified in local numbering

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatRestoreLocalSubMatrix(Mat mat,IS isrow,IS iscol,Mat *submat)

Not Collective

### Input Parameters

| mat | - matrix to extract local submatrix from
| isrow | - local row indices for submatrix
| iscol | - local column indices for submatrix
| submat | - the submatrix

### See Also

MatGetLocalSubMatrix()

### Level

intermediate

### Location

src/mat/interface/matrix.c

### Examples

src/snes/tutorials/ex28.c.html
src/ts/tutorials/ex14.c.html

### Implementations

MatRestoreLocalSubMatrix_Nest in src/mat/impls/nest/matnest.c
Index of all Mat routines
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