MatGetOwnershipIS#

Get row and column ownership of a matrices’ values as index sets. 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 :any:<sec_matlayout> for details on matrix layouts.

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

See Also#

Mat, MatGetOwnershipRange(), MatGetOwnershipRangeColumn(), MatSetValues(), MATELEMENTAL, MATSCALAPACK

Level#

intermediate

Location#

src/mat/interface/matrix.c

Examples#

src/ksp/ksp/tutorials/ex76.c.html

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 manual pages