MatGetOwnershipIS

Get row and column ownership of a matrices’ values as index sets.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatGetOwnershipIS(Mat A, IS *rows, IS *cols)

Not Collective

Input Parameter

• A - matrix

Output Parameters

• rows - rows in which this process owns elements, , use NULL to not obtain this value

• cols - columns in which this process owns elements, use NULL to not obtain this value

Note

You should call ISDestroy() on the returned IS

For most matrices, excluding MATELEMENTAL and MATSCALAPACK, this corresponds to values returned by MatGetOwnershipRange(), MatGetOwnershipRangeColumn(). For MATELEMENTAL and MATSCALAPACK the ownership is more complicated. See Matrix Layouts for details on matrix layouts.

See Also

Matrices, IS, Mat, MatGetOwnershipRanges(), MatSetValues(), MATELEMENTAL, MATSCALAPACK

Level

intermediate

Location

src/mat/interface/matrix.c

Examples

src/ksp/ksp/tutorials/ex76.c

Implementations

MatGetOwnershipIS_Elemental() in src/mat/impls/elemental/matelem.cxx
MatGetOwnershipIS_ScaLAPACK() in src/mat/impls/scalapack/matscalapack.c

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Index of all Mat routines
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Index of all manual pages