PETSc version 3.17.5
MatCreateSubMatricesMPI
Extracts MPI submatrices across a sub communicator of mat (by pairs of IS that may live on subcomms).
Synopsis
#include "petscmat.h"
PetscErrorCode MatCreateSubMatricesMPI(Mat mat,PetscInt n,const IS irow[],const IS icol[],MatReuse scall,Mat *submat[])
Collective on Mat
Input Parameters
| mat | - the matrix
|
| n | - the number of submatrixes to be extracted
|
| irow, icol | - index sets of rows and columns to extract
|
| scall | - either MAT_INITIAL_MATRIX or MAT_REUSE_MATRIX
|
Output Parameter
| submat | - the array of submatrices
|
See Also
MatCreateSubMatrices(), MatCreateSubMatrix(), MatGetRow(), MatGetDiagonal(), MatReuse
Level
advanced
Location
src/mat/interface/matrix.c
Implementations
MatCreateSubMatricesMPI_MPIAdj in src/mat/impls/adj/mpi/mpiadj.c
src/mat/impls/aij/mpi/mpiov.c:3045:PetscErrorCode MatCreateSubMatricesMPI_MPIXAIJ(Mat C,PetscInt ismax,const IS isrow[],const IS iscol[],MatReuse scall,Mat *submat[],
MatCreateSubMatricesMPI_MPIAIJ in src/mat/impls/aij/mpi/mpiov.c
Index of all Mat routines
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Index of all manual pages