1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "VecView() with a DMDA1d vector and draw viewer.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscdm.h> 5c4762a1bSJed Brown #include <petscdmda.h> 6c4762a1bSJed Brown #include <petscao.h> 7c4762a1bSJed Brown 8*9371c9d4SSatish Balay PetscErrorCode apply(void *ctx, PetscInt n, const PetscScalar *x, PetscScalar *y) { 9c4762a1bSJed Brown PetscInt i; 10c4762a1bSJed Brown 11*9371c9d4SSatish Balay for (i = 0; i < n; i++) { 12*9371c9d4SSatish Balay y[3 * i] = x[i]; 13*9371c9d4SSatish Balay y[3 * i + 1] = x[i] * x[i]; 14*9371c9d4SSatish Balay y[3 * i + 2] = x[i] * x[i] * x[i]; 15*9371c9d4SSatish Balay } 16c4762a1bSJed Brown return 0; 17c4762a1bSJed Brown } 18c4762a1bSJed Brown 19*9371c9d4SSatish Balay int main(int argc, char **argv) { 20c4762a1bSJed Brown DM da; 21c4762a1bSJed Brown Vec global; 22c4762a1bSJed Brown PF pf; 23c4762a1bSJed Brown 24327415f7SBarry Smith PetscFunctionBeginUser; 259566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 269566063dSJacob Faibussowitsch PetscCall(DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 10, 3, 1, NULL, &da)); 279566063dSJacob Faibussowitsch PetscCall(DMSetFromOptions(da)); 289566063dSJacob Faibussowitsch PetscCall(DMSetUp(da)); 299566063dSJacob Faibussowitsch PetscCall(DMCreateGlobalVector(da, &global)); 309566063dSJacob Faibussowitsch PetscCall(PFCreate(PETSC_COMM_WORLD, 1, 3, &pf)); 319566063dSJacob Faibussowitsch PetscCall(PFSet(pf, apply, NULL, NULL, NULL, NULL)); 329566063dSJacob Faibussowitsch PetscCall(PFApplyVec(pf, NULL, global)); 339566063dSJacob Faibussowitsch PetscCall(PFDestroy(&pf)); 349566063dSJacob Faibussowitsch PetscCall(VecView(global, PETSC_VIEWER_DRAW_WORLD)); 359566063dSJacob Faibussowitsch PetscCall(VecDestroy(&global)); 369566063dSJacob Faibussowitsch PetscCall(DMDestroy(&da)); 379566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 38b122ec5aSJacob Faibussowitsch return 0; 39c4762a1bSJed Brown } 40c4762a1bSJed Brown 41c4762a1bSJed Brown /*TEST 42c4762a1bSJed Brown 43c4762a1bSJed Brown test: 44c4762a1bSJed Brown nsize: 2 45c4762a1bSJed Brown requires: x 46c4762a1bSJed Brown 47c4762a1bSJed Brown TEST*/ 48