1 2 static char help[] = "Tests MatTranspose()\n\n"; 3 4 #include <petscmat.h> 5 6 int main(int argc, char **args) 7 { 8 Mat C, A; 9 PetscScalar v; 10 PetscInt i, j, m = 4, n = 4, Ii, J, Istart, Iend; 11 PetscMPIInt rank, size; 12 PetscBool equal = PETSC_FALSE; 13 14 PetscFunctionBeginUser; 15 PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 16 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 17 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 18 19 PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 20 n = m; 21 22 PetscCall(MatCreateAIJ(PETSC_COMM_WORLD, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n, 5, NULL, 5, NULL, &C)); 23 24 /* create the symmetric matrix for the five point stencil */ 25 PetscCall(MatGetOwnershipRange(C, &Istart, &Iend)); 26 for (Ii = Istart; Ii < Iend; Ii++) { 27 v = -1.0; 28 i = Ii / n; 29 j = Ii - i * n; 30 if (i > 0) { 31 J = Ii - n; 32 PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 33 } 34 if (i < m - 1) { 35 J = Ii + n; 36 PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 37 } 38 if (j > 0) { 39 J = Ii - 1; 40 PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 41 } 42 if (j < n - 1) { 43 J = Ii + 1; 44 PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 45 } 46 v = 4.0; 47 PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 48 } 49 PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 50 PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 51 52 PetscCall(MatTranspose(C, MAT_INITIAL_MATRIX, &A)); 53 54 PetscCall(MatEqual(C, A, &equal)); 55 PetscCheck(equal, PETSC_COMM_SELF, PETSC_ERR_SUP, "C != C^T"); 56 57 PetscCall(MatDestroy(&C)); 58 PetscCall(MatDestroy(&A)); 59 PetscCall(PetscFinalize()); 60 return 0; 61 } 62 63 /*TEST 64 65 test: 66 67 TEST*/ 68