petsc-3.5.4 2015-05-23
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MatGetDiagonalBlock

 Returns the part of the matrix associated with the on-process coupling

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatGetDiagonalBlock(Mat A,Mat *a)
Not Collective

Input Parameters

A -the matrix

Output Parameters

a -the diagonal part (which is a SEQUENTIAL matrix)

Notes: see the manual page for MatCreateAIJ() for more information on the "diagonal part" of the matrix.

Level:advanced
Location:src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages