MatAIJGetLocalMat#
Creates a MATSEQAIJ from a MATAIJ matrix.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatAIJGetLocalMat(Mat A, Mat *A_loc)
Not Collective
Input Parameter#
A - the matrix
Output Parameter#
A_loc - the local sequential matrix generated
Notes#
The matrix is created by taking A’s local rows and putting them into a sequential matrix
with mlocal rows and n columns. Where mlocal is obtained with MatGetLocalSize() and
n is the global column count obtained with MatGetSize()
In other words combines the two parts of a parallel MATMPIAIJ matrix on each process to a single matrix.
For parallel matrices this creates an entirely new matrix. If the matrix is sequential it merely increases the reference count.
Destroy the matrix with MatDestroy()
See Also#
Level#
developer
Location#
src/mat/impls/aij/mpi/mpiaij.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages