PETSc version 3.15.5
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:3090: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