[petsc-users] Build a PETSc matrix with "ghost lines" ?

['PEYROUNETTE Myriam']

Hi all,

I am partitioning an unstructured network in order to parallelize my 
code. To communicate some node data between processors, I have to deal 
with ghost values. I know PETSc allows its vectors to carry ghost values 
thanks to VecCreateGhost() or VecMPISetGhost() functions. In the same 
spirit, are there similar functions to create matrix with ghost lines ?

To give an example : I have a matrix containing the coordinates of each 
node and I would like to access the coordinates of a neighboring node, 
even if it is located on a different processor.

Thanks,
Myriam