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 Matrix Layouts 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#

Matrices, Mat, MatGetOwnershipRange(), MatGetOwnershipRangeColumn(), 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 manual pages