MatNestGetISs

Returns the index sets partitioning the row and column spaces of a MATNEST

Synopsis

#include "petscmat.h"   
PetscErrorCode MatNestGetISs(Mat A, IS rows[], IS cols[])

Not Collective

Input Parameter

• A - MATNEST matrix

Output Parameters

• rows - array of row index sets (pass NULL to ignore)

• cols - array of column index sets (pass NULL to ignore)

Note

The user must have allocated arrays of the correct size. The reference count is not increased on the returned ISs.

See Also

Matrices, Mat, MATNEST, MatNestGetSubMat(), MatNestGetSubMats(), MatNestGetSize(), MatNestGetLocalISs(), MatCreateNest(), MatNestSetSubMats()

Level

advanced

Location

src/mat/impls/nest/matnest.c

Examples

src/snes/tutorials/ex70.c
src/ksp/ksp/tutorials/ex81a.c
src/ksp/ksp/tutorials/ex81.c

Implementations

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

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