MatNestSetSubMats

Sets the nested submatrices in a MATNEST

Synopsis

#include "petscmat.h"   
PetscErrorCode MatNestSetSubMats(Mat A, PetscInt nr, const IS is_row[], PetscInt nc, const IS is_col[], const Mat a[])

Collective

Input Parameters

• A - MATNEST matrix

• nr - number of nested row blocks

• is_row - index sets for each nested row block, or NULL to make contiguous

• nc - number of nested column blocks

• is_col - index sets for each nested column block, or NULL to make contiguous

• a - array of nr*nc submatrices, or NULL

Notes

This always resets any block matrix information previously set. Pass NULL in the corresponding entry of a for an empty block.

In both C and Fortran, a must be a row-major order array containing the matrices. See MatCreateNest() for an example.

See Also

Matrices, Mat, MATNEST, MatCreateNest(), MatNestSetSubMat(), MatNestGetSubMat(), MatNestGetSubMats()

Level

advanced

Location

src/mat/impls/nest/matnest.c

Examples

src/ksp/ksp/tutorials/ex85.c
src/ksp/ksp/tutorials/ex19.c

Implementations

MatNestSetSubMats_Nest() in src/mat/impls/nest/matnest.c

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