Actual source code: ex37.c
petsc-3.4.2 2013-07-02
2: static char help[] = "VecView() with a DMDA1d vector and draw viewer.\n\n";
4: #include <petscdmda.h>
5: #include <petscao.h>
7: PetscErrorCode apply(void *ctx,PetscInt n,const PetscScalar *x,PetscScalar *y)
8: {
9: PetscInt i;
11: for (i=0; i<n; i++) {y[3*i] = x[i]; y[3*i+1] = x[i]*x[i]; y[3*i+2] = x[i]*x[i]*x[i];}
12: return 0;
13: }
17: int main(int argc,char **argv)
18: {
20: DM da;
21: Vec global;
22: PF pf;
24: PetscInitialize(&argc,&argv,(char*)0,help);
26: DMDACreate1d(PETSC_COMM_WORLD,DMDA_BOUNDARY_NONE,10,3,1,NULL,&da);
27: DMCreateGlobalVector(da,&global);
28: PFCreate(PETSC_COMM_WORLD,1,3,&pf);
29: PFSet(pf,apply,NULL,NULL,NULL,NULL);
30: PFApplyVec(pf,NULL,global);
31: PFDestroy(&pf);
32: VecView(global,PETSC_VIEWER_DRAW_WORLD);
33: VecDestroy(&global);
34: DMDestroy(&da);
35: PetscFinalize();
36: return 0;
37: }