1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatTranspose()\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*9371c9d4SSatish Balay int main(int argc, char **args) { 7c4762a1bSJed Brown Mat C, A; 8c4762a1bSJed Brown PetscScalar v; 9c4762a1bSJed Brown PetscInt i, j, m = 4, n = 4, Ii, J, Istart, Iend; 10c4762a1bSJed Brown PetscMPIInt rank, size; 11c4762a1bSJed Brown PetscBool equal = PETSC_FALSE; 12c4762a1bSJed Brown 13327415f7SBarry Smith PetscFunctionBeginUser; 149566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 159566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 169566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 17c4762a1bSJed Brown 189566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 19c4762a1bSJed Brown n = m; 20c4762a1bSJed Brown 219566063dSJacob Faibussowitsch PetscCall(MatCreateAIJ(PETSC_COMM_WORLD, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n, 5, NULL, 5, NULL, &C)); 22c4762a1bSJed Brown 23c4762a1bSJed Brown /* create the symmetric matrix for the five point stencil */ 249566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &Istart, &Iend)); 25c4762a1bSJed Brown for (Ii = Istart; Ii < Iend; Ii++) { 26*9371c9d4SSatish Balay v = -1.0; 27*9371c9d4SSatish Balay i = Ii / n; 28*9371c9d4SSatish Balay j = Ii - i * n; 29*9371c9d4SSatish Balay if (i > 0) { 30*9371c9d4SSatish Balay J = Ii - n; 31*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 32*9371c9d4SSatish Balay } 33*9371c9d4SSatish Balay if (i < m - 1) { 34*9371c9d4SSatish Balay J = Ii + n; 35*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 36*9371c9d4SSatish Balay } 37*9371c9d4SSatish Balay if (j > 0) { 38*9371c9d4SSatish Balay J = Ii - 1; 39*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 40*9371c9d4SSatish Balay } 41*9371c9d4SSatish Balay if (j < n - 1) { 42*9371c9d4SSatish Balay J = Ii + 1; 43*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 44*9371c9d4SSatish Balay } 45*9371c9d4SSatish Balay v = 4.0; 46*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 47c4762a1bSJed Brown } 489566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 499566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 50c4762a1bSJed Brown 519566063dSJacob Faibussowitsch PetscCall(MatTranspose(C, MAT_INITIAL_MATRIX, &A)); 52c4762a1bSJed Brown 539566063dSJacob Faibussowitsch PetscCall(MatEqual(C, A, &equal)); 5428b400f6SJacob Faibussowitsch PetscCheck(equal, PETSC_COMM_SELF, PETSC_ERR_SUP, "C != C^T"); 55c4762a1bSJed Brown 569566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 579566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 589566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 59b122ec5aSJacob Faibussowitsch return 0; 60c4762a1bSJed Brown } 61c4762a1bSJed Brown 62c4762a1bSJed Brown /*TEST 63c4762a1bSJed Brown 64c4762a1bSJed Brown test: 65c4762a1bSJed Brown 66c4762a1bSJed Brown TEST*/ 67