petsc-3.14.5 2021-03-03
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# MatGetLocalSize

Returns the number of local rows and local columns of a matrix, that is the local size of the left and right vectors as returned by MatCreateVecs().

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatGetLocalSize(Mat mat,PetscInt *m,PetscInt *n)

Not Collective

### Input Parameters

| mat | - the matrix

### Output Parameters

| m | - the number of local rows
| n | - the number of local columns

Note: both output parameters can be NULL on input.

### See Also

MatGetSize()

### Level

beginner

### Location

src/mat/interface/matrix.c

### Examples

src/ksp/ksp/tutorials/ex10.c.html
src/ksp/ksp/tutorials/ex27.c.html
src/ksp/ksp/tutorials/ex72.c.html
src/ksp/ksp/tutorials/ex77.c.html
src/ksp/ksp/tutorials/ex77f.F90.html
src/snes/tutorials/ex12.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages