petsc-3.7.7 2017-09-25
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MatGetGhosts

 Get the global index of all ghost nodes defined by the sparse matrix

Synopsis

#include "petscmat.h" 
PetscErrorCode MatGetGhosts(Mat mat,PetscInt *nghosts,const PetscInt *ghosts[])
Collective on Mat

Input Parameter

mat -the matrix

Output Parameters

nghosts - number of ghosts (note for BAIJ matrices there is one ghost for each block)
ghosts - the global indices of the ghost points

Notes: the nghosts and ghosts are suitable to pass into VecCreateGhost()

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