petsc-3.10.2 2018-10-09
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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:3074: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