7   Mat         C;  in main()  local
22   PetscCall(MatCreate(PETSC_COMM_WORLD, &C));  in main()
23   PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n));  in main()
24   PetscCall(MatSetFromOptions(C));  in main()
25   PetscCall(MatSeqAIJSetPreallocation(C, 5, NULL));  in main()
26   PetscCall(MatMPIAIJSetPreallocation(C, 5, NULL, 5, NULL));  in main()
27   PetscCall(MatSetUp(C));  in main()
35         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
39         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
43         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
47         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
50       PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES));  in main()
53   PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));  in main()
54   PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));  in main()
55   PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD));  in main()
57   PetscCall(MatCreateVecs(C, NULL, &yy));  in main()
60   PetscCall(MatGetColumnVector(C, yy, col));  in main()
65   PetscCall(MatDestroy(&C));  in main()