1c4762a1bSJed Brown static char help[] = "Test MATMFFD for the rectangular case\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5*2a8381b2SBarry Smith static PetscErrorCode myF(PetscCtx ctx, Vec x, Vec y) 6d71ae5a4SJacob Faibussowitsch { 7c4762a1bSJed Brown const PetscScalar *ax; 8c4762a1bSJed Brown PetscScalar *ay; 9c4762a1bSJed Brown PetscInt i, j, m, n; 10c4762a1bSJed Brown 11c4762a1bSJed Brown PetscFunctionBegin; 129566063dSJacob Faibussowitsch PetscCall(VecGetArrayRead(x, &ax)); 139566063dSJacob Faibussowitsch PetscCall(VecGetArray(y, &ay)); 149566063dSJacob Faibussowitsch PetscCall(VecGetLocalSize(y, &m)); 159566063dSJacob Faibussowitsch PetscCall(VecGetLocalSize(x, &n)); 16c4762a1bSJed Brown for (i = 0; i < m; i++) { 17c4762a1bSJed Brown PetscScalar xx, yy; 18c4762a1bSJed Brown 19c4762a1bSJed Brown yy = 0.0; 20c4762a1bSJed Brown for (j = 0; j < n; j++) { 21c4762a1bSJed Brown xx = PetscPowScalarInt(ax[j], i + 1); 22c4762a1bSJed Brown yy += xx; 23c4762a1bSJed Brown } 24c4762a1bSJed Brown ay[i] = yy; 25c4762a1bSJed Brown } 269566063dSJacob Faibussowitsch PetscCall(VecRestoreArray(y, &ay)); 279566063dSJacob Faibussowitsch PetscCall(VecRestoreArrayRead(x, &ax)); 283ba16761SJacob Faibussowitsch PetscFunctionReturn(PETSC_SUCCESS); 29c4762a1bSJed Brown } 30c4762a1bSJed Brown 31d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 32d71ae5a4SJacob Faibussowitsch { 33c4762a1bSJed Brown Mat A, B; 34c4762a1bSJed Brown Vec base; 35c4762a1bSJed Brown PetscInt m = 3, n = 2; 36c4762a1bSJed Brown 37327415f7SBarry Smith PetscFunctionBeginUser; 38c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 399566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL)); 409566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 419566063dSJacob Faibussowitsch PetscCall(MatCreateMFFD(PETSC_COMM_WORLD, PETSC_DECIDE, PETSC_DECIDE, m, n, &A)); 429566063dSJacob Faibussowitsch PetscCall(MatCreateVecs(A, &base, NULL)); 439566063dSJacob Faibussowitsch PetscCall(VecSet(base, 2.0)); 449566063dSJacob Faibussowitsch PetscCall(MatMFFDSetFunction(A, myF, NULL)); 459566063dSJacob Faibussowitsch PetscCall(MatMFFDSetBase(A, base, NULL)); 469566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 479566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 489566063dSJacob Faibussowitsch PetscCall(MatComputeOperator(A, NULL, &B)); 499566063dSJacob Faibussowitsch PetscCall(VecDestroy(&base)); 509566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 519566063dSJacob Faibussowitsch PetscCall(MatDestroy(&B)); 529566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 53b122ec5aSJacob Faibussowitsch return 0; 54c4762a1bSJed Brown } 55c4762a1bSJed Brown 56c4762a1bSJed Brown /*TEST 57c4762a1bSJed Brown 58c4762a1bSJed Brown test: 59c4762a1bSJed Brown nsize: {{1 2 3 4}} 603886731fSPierre Jolivet output_file: output/empty.out 61c4762a1bSJed Brown 62c4762a1bSJed Brown TEST*/ 63