Actual source code: ex14.c
1: /*$Id: ex14.c,v 1.17 2001/08/07 03:04:42 balay Exp $*/
3: static char help[] = "Tests saving DA vectors to files.nn";
5: #include petscda.h
6: #include petscsys.h
8: int main(int argc,char **argv)
9: {
10: int rank,M = 10,N = 8,m = PETSC_DECIDE,n = PETSC_DECIDE,ierr;
11: int dof = 1;
12: DA da;
13: Vec local,global,natural;
14: PetscScalar value;
15: PetscViewer bviewer;
17: PetscInitialize(&argc,&argv,(char*)0,help);
19: /* Read options */
20: PetscOptionsGetInt(PETSC_NULL,"-M",&M,PETSC_NULL);
21: PetscOptionsGetInt(PETSC_NULL,"-N",&N,PETSC_NULL);
22: PetscOptionsGetInt(PETSC_NULL,"-m",&m,PETSC_NULL);
23: PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
24: PetscOptionsGetInt(PETSC_NULL,"-dof",&dof,PETSC_NULL);
26: /* Create distributed array and get vectors */
27: DACreate2d(PETSC_COMM_WORLD,DA_NONPERIODIC,DA_STENCIL_BOX,
28: M,N,m,n,dof,1,PETSC_NULL,PETSC_NULL,&da);
29: DACreateGlobalVector(da,&global);
30: DACreateLocalVector(da,&local);
32: value = -3.0;
33: VecSet(&value,global);
34: DAGlobalToLocalBegin(da,global,INSERT_VALUES,local);
35: DAGlobalToLocalEnd(da,global,INSERT_VALUES,local);
37: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
38: value = rank+1;
39: VecScale(&value,local);
40: DALocalToGlobal(da,local,ADD_VALUES,global);
42: DACreateNaturalVector(da,&natural);
43: DAGlobalToNaturalBegin(da,global,INSERT_VALUES,natural);
44: DAGlobalToNaturalEnd(da,global,INSERT_VALUES,natural);
46: DASetFieldName(da,0,"First field");
47: VecView(global,PETSC_VIEWER_DRAW_WORLD);
49: PetscViewerBinaryOpen(PETSC_COMM_WORLD,"daoutput",PETSC_BINARY_CREATE,&bviewer);
50: DAView(da,bviewer);
51: VecView(global,bviewer);
52: PetscViewerDestroy(bviewer);
54: /* Free memory */
55: VecDestroy(local);
56: VecDestroy(global);
57: VecDestroy(natural);
58: DADestroy(da);
59: PetscFinalize();
60: return 0;
61: }
62: