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, MatISRestoreLocalMat()

Level#

advanced

Location#

src/mat/impls/is/matis.c

Examples#

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

Implementations#

MatISGetLocalMat_IS in src/mat/impls/is/matis.c


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