Actual source code: ex58.c
2: static char help[] = "Tests MatTranspose() and MatEqual() for MPIAIJ matrices.\n\n";
4: #include <petscmat.h>
6: int main(int argc, char **argv)
7: {
8: Mat A, B;
9: PetscInt m = 7, n, i, rstart, rend, cols[3];
10: PetscScalar v[3];
11: PetscBool equal;
12: const char *eq[2];
14: PetscFunctionBeginUser;
15: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
16: PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL));
17: n = m;
19: /* ------- Assemble matrix, --------- */
21: PetscCall(MatCreateAIJ(PETSC_COMM_WORLD, PETSC_DECIDE, PETSC_DECIDE, m, n, 0, 0, 0, 0, &A));
22: PetscCall(MatSetOption(A, MAT_NEW_NONZERO_LOCATION_ERR, PETSC_FALSE));
23: PetscCall(MatGetOwnershipRange(A, &rstart, &rend));
24: if (!rstart) {
25: cols[0] = 0;
26: cols[1] = 1;
27: v[0] = 2.0;
28: v[1] = -1.0;
29: PetscCall(MatSetValues(A, 1, &rstart, 2, cols, v, INSERT_VALUES));
30: rstart++;
31: }
32: if (rend == m) {
33: rend--;
34: cols[0] = rend - 1;
35: cols[1] = rend;
36: v[0] = -1.0;
37: v[1] = 2.0;
38: PetscCall(MatSetValues(A, 1, &rend, 2, cols, v, INSERT_VALUES));
39: }
40: v[0] = -1.0;
41: v[1] = 2.0;
42: v[2] = -1.0;
43: for (i = rstart; i < rend; i++) {
44: cols[0] = i - 1;
45: cols[1] = i;
46: cols[2] = i + 1;
47: PetscCall(MatSetValues(A, 1, &i, 3, cols, v, INSERT_VALUES));
48: }
49: PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY));
50: PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY));
52: PetscCall(MatTranspose(A, MAT_INITIAL_MATRIX, &B));
54: PetscCall(MatEqual(A, B, &equal));
56: eq[0] = "not equal";
57: eq[1] = "equal";
58: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Matrices are %s\n", eq[equal]));
60: PetscCall(MatTranspose(A, MAT_REUSE_MATRIX, &B));
61: PetscCall(MatEqual(A, B, &equal));
62: if (!equal) PetscCall(PetscPrintf(PETSC_COMM_WORLD, "MatTranspose with MAT_REUSE_MATRIX failed"));
64: /* Free data structures */
65: PetscCall(MatDestroy(&A));
66: PetscCall(MatDestroy(&B));
68: PetscCall(PetscFinalize());
69: return 0;
70: }
72: /*TEST
74: test:
76: test:
77: suffix: 2
78: nsize: 2
79: output_file: output/ex58_1.out
81: TEST*/