MatGetOwnershipRangesColumn#
Returns the ranges of matrix columns associated with rows of a vector one multiplies this vector by that are owned by each processor. (The columns of the “diagonal blocks”, for most sparse matrix formats). See Matrix Layouts for details on matrix layouts.
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 then the total length at the end
See Also#
Matrices, Mat, MatGetOwnershipRange(), MatGetOwnershipRangeColumn(), MatGetOwnershipRanges()
Level#
beginner
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages