MatGetOwnershipRangesColumn#

Returns the ranges of matrix columns associated with rows of a vector one multiplies this vector by that are owned by each processor.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatGetOwnershipRangesColumn(Mat mat, const PetscInt **ranges)

Not Collective, unless matrix has not been allocated

Input Parameter#

  • mat - the matrix

Output Parameter#

  • ranges - start of each processors portion plus one more than the total length at the end

Note#

Returns the columns of the “diagonal blocks”, for most sparse matrix formats. See Matrix Layouts for details on matrix layouts.

See Also#

Matrices, Mat, MatGetOwnershipRange(), MatGetOwnershipRangeColumn(), MatGetOwnershipRanges()

Level#

beginner

Location#

src/mat/interface/matrix.c


Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages