Dear petsc developers and users, I am a new petsc user ^_^. I have some questions about using DMDA_BOUNDARY_GHOSTED.
1. I have 2D Poisson code with domain (nx, ny), and I used DMDA_BOUNDARY_NONE, then the size of the matrix is (nx*ny)X(nx*ny). *what is the size of the matrix if I used DMDA_BOUNDARY_GHOSTED? is it the same size as DMDA_BOUNDARY_NONE*? 2. if the matrix size of DMDA_BOUNDARY_GHOSTED isn't the same as DMDA_BOUNDARY_NONE, *how i can view the matrix including ghost points*? I ask this one because I used MatView(P, PETSC_VIEWER_STDOUT_WORLD) to show the matrix but excluded ghost points. I hope someone can explain my wonder :) P/S: maybe, those question is simple and a bit stupid ^_^. Have a nice day, -- Quynh Nguyen Graduate student, Ocean Engineering. School of Naval Architecture and Ocean Engineering, University of Ulsan. ----------------------------------------------------------------------------------------- Mobile: (+82) 010-9394-5595 Email: [email protected]; [email protected]
