1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatTranspose()\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 7*d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown Mat C, A; 9c4762a1bSJed Brown PetscScalar v; 10c4762a1bSJed Brown PetscInt i, j, m = 4, n = 4, Ii, J, Istart, Iend; 11c4762a1bSJed Brown PetscMPIInt rank, size; 12c4762a1bSJed Brown PetscBool equal = PETSC_FALSE; 13c4762a1bSJed Brown 14327415f7SBarry Smith PetscFunctionBeginUser; 159566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 169566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 179566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 18c4762a1bSJed Brown 199566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 20c4762a1bSJed Brown n = m; 21c4762a1bSJed Brown 229566063dSJacob Faibussowitsch PetscCall(MatCreateAIJ(PETSC_COMM_WORLD, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n, 5, NULL, 5, NULL, &C)); 23c4762a1bSJed Brown 24c4762a1bSJed Brown /* create the symmetric matrix for the five point stencil */ 259566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &Istart, &Iend)); 26c4762a1bSJed Brown for (Ii = Istart; Ii < Iend; Ii++) { 279371c9d4SSatish Balay v = -1.0; 289371c9d4SSatish Balay i = Ii / n; 299371c9d4SSatish Balay j = Ii - i * n; 309371c9d4SSatish Balay if (i > 0) { 319371c9d4SSatish Balay J = Ii - n; 329371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 339371c9d4SSatish Balay } 349371c9d4SSatish Balay if (i < m - 1) { 359371c9d4SSatish Balay J = Ii + n; 369371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 379371c9d4SSatish Balay } 389371c9d4SSatish Balay if (j > 0) { 399371c9d4SSatish Balay J = Ii - 1; 409371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 419371c9d4SSatish Balay } 429371c9d4SSatish Balay if (j < n - 1) { 439371c9d4SSatish Balay J = Ii + 1; 449371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 459371c9d4SSatish Balay } 469371c9d4SSatish Balay v = 4.0; 479371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 48c4762a1bSJed Brown } 499566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 509566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 51c4762a1bSJed Brown 529566063dSJacob Faibussowitsch PetscCall(MatTranspose(C, MAT_INITIAL_MATRIX, &A)); 53c4762a1bSJed Brown 549566063dSJacob Faibussowitsch PetscCall(MatEqual(C, A, &equal)); 5528b400f6SJacob Faibussowitsch PetscCheck(equal, PETSC_COMM_SELF, PETSC_ERR_SUP, "C != C^T"); 56c4762a1bSJed Brown 579566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 589566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 599566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 60b122ec5aSJacob Faibussowitsch return 0; 61c4762a1bSJed Brown } 62c4762a1bSJed Brown 63c4762a1bSJed Brown /*TEST 64c4762a1bSJed Brown 65c4762a1bSJed Brown test: 66c4762a1bSJed Brown 67c4762a1bSJed Brown TEST*/ 68