petsc-3.12.4 2020-02-04
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# MatISGetLocalMat

Gets the local matrix stored inside a MATIS matrix.

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatISGetLocalMat(Mat mat,Mat *local)

### Input Parameter

mat -the matrix

### Output Parameter

local -the local matrix

### Notes

This can be called if you have precomputed the nonzero structure of the matrix and want to provide it to the inner matrix object to improve the performance of the MatSetValues() operation.

Call MatISRestoreLocalMat() when finished with the local matrix.

### See Also

MATIS

### Level

advanced

### Location

src/mat/impls/is/matis.c

### Examples

src/ksp/ksp/examples/tutorials/ex59.c.html
src/ksp/ksp/examples/tutorials/ex71.c.html

### Implementations

MatISGetLocalMat_IS in src/mat/impls/is/matis.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages