2: static char help[] = "Tests VecView() contour plotting for 2d DAs.\n\n";

 4:  #include petscda.h
 5:  #include petscsys.h

  9: int main(int argc,char **argv)
 10: {
 11:   PetscMPIInt    rank;
 12:   PetscInt       M = 10,N = 8,m = PETSC_DECIDE,n = PETSC_DECIDE;
 14:   PetscTruth     flg;
 15:   DA             da;
 16:   PetscViewer    viewer;
 17:   Vec            local,global;
 18:   PetscScalar    value;
 19:   DAPeriodicType ptype = DA_NONPERIODIC;
 20:   DAStencilType  stype = DA_STENCIL_BOX;
 21: #if defined(PETSC_HAVE_MATLAB_ENGINE)
 22:   PetscViewer    mviewer;
 23: #endif

 25:   PetscInitialize(&argc,&argv,(char*)0,help);
 26:   PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer);
 27: #if defined(PETSC_HAVE_MATLAB_ENGINE)
 28:   PetscViewerMatlabOpen(PETSC_COMM_WORLD,"tmp.mat",FILE_MODE_WRITE,&mviewer);
 29: #endif

 31:   /* Read options */
 32:   PetscOptionsGetInt(PETSC_NULL,"-M",&M,PETSC_NULL);
 33:   PetscOptionsGetInt(PETSC_NULL,"-N",&N,PETSC_NULL);
 34:   PetscOptionsGetInt(PETSC_NULL,"-m",&m,PETSC_NULL);
 35:   PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
 36:   PetscOptionsHasName(PETSC_NULL,"-star_stencil",&flg);
 37:   if (flg) stype = DA_STENCIL_STAR;

 39:   /* Create distributed array and get vectors */
 40:   DACreate2d(PETSC_COMM_WORLD,ptype,stype,M,N,m,n,1,1,PETSC_NULL,PETSC_NULL,&da);
 41:   DACreateGlobalVector(da,&global);
 42:   DACreateLocalVector(da,&local);

 44:   value = -3.0;
 45:   VecSet(global,value);
 46:   DAGlobalToLocalBegin(da,global,INSERT_VALUES,local);
 47:   DAGlobalToLocalEnd(da,global,INSERT_VALUES,local);

 49:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 50:   value = rank+1;
 51:   VecScale(local,value);
 52:   DALocalToGlobal(da,local,ADD_VALUES,global);

 54:   DAView(da,viewer);
 55:   VecView(global,viewer);
 56: #if defined(PETSC_HAVE_MATLAB_ENGINE)
 57:   DAView(da,mviewer);
 58:   VecView(global,mviewer);
 59: #endif

 61:   /* Free memory */
 62: #if defined(PETSC_HAVE_MATLAB_ENGINE)
 63:   PetscViewerDestroy(mviewer);
 64: #endif
 65:   PetscViewerDestroy(viewer);
 66:   VecDestroy(local);
 67:   VecDestroy(global);
 68:   DADestroy(da);
 69:   PetscFinalize();
 70:   return 0;
 71: }
 72: