Actual source code: ex179.c
2: static char help[] = "Tests MatTranspose() with MAT_REUSE_MATRIX and different nonzero pattern\n\n";
4: #include <petscmat.h>
6: int main(int argc, char **argv)
7: {
8: Mat A, B;
9: PetscMPIInt size;
11: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
12: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
13: PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This is a uniprocessor example only!");
14: PetscCall(MatCreateSeqAIJ(PETSC_COMM_SELF, 2, 2, 2, NULL, &A));
15: PetscCall(MatSetValue(A, 0, 0, 1.0, INSERT_VALUES));
16: PetscCall(MatSetValue(A, 0, 1, 2.0, INSERT_VALUES));
17: PetscCall(MatSetValue(A, 1, 1, 4.0, INSERT_VALUES));
18: PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
19: PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
20: PetscCall(MatView(A, PETSC_VIEWER_STDOUT_SELF));
21: PetscCall(MatTranspose(A, MAT_INITIAL_MATRIX, &B));
22: PetscCall(MatView(B, PETSC_VIEWER_STDOUT_SELF));
23: PetscCall(MatSetOption(A, MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE));
24: PetscCall(MatSetValue(A, 1, 0, 3.0, INSERT_VALUES));
25: PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
26: PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
27: PetscCall(MatView(A, PETSC_VIEWER_STDOUT_SELF));
28: PetscCall(MatTranspose(A, MAT_REUSE_MATRIX, &B));
29: PetscCall(MatView(B, PETSC_VIEWER_STDOUT_SELF));
30: PetscCall(MatDestroy(&A));
31: PetscCall(MatDestroy(&B));
32: PetscCall(PetscFinalize());
33: return 0;
34: }
36: /*TEST
38: test:
40: TEST*/