1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Passes a sparse matrix to MATLAB.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*9371c9d4SSatish Balay int main(int argc, char **args) { 7c4762a1bSJed Brown PetscInt m = 4, n = 5, i, j, II, J; 8c4762a1bSJed Brown PetscScalar one = 1.0, v; 9c4762a1bSJed Brown Vec x; 10c4762a1bSJed Brown Mat A; 11c4762a1bSJed Brown 12327415f7SBarry Smith PetscFunctionBeginUser; 139566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 149566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 159566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL)); 16c4762a1bSJed Brown 179566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 189566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 199566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(A)); 209566063dSJacob Faibussowitsch PetscCall(MatSetUp(A)); 21c4762a1bSJed Brown 22c4762a1bSJed Brown for (i = 0; i < m; i++) { 23c4762a1bSJed Brown for (j = 0; j < n; j++) { 24*9371c9d4SSatish Balay v = -1.0; 25*9371c9d4SSatish Balay II = j + n * i; 26*9371c9d4SSatish Balay if (i > 0) { 27*9371c9d4SSatish Balay J = II - n; 28*9371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 29*9371c9d4SSatish Balay } 30*9371c9d4SSatish Balay if (i < m - 1) { 31*9371c9d4SSatish Balay J = II + n; 32*9371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 33*9371c9d4SSatish Balay } 34*9371c9d4SSatish Balay if (j > 0) { 35*9371c9d4SSatish Balay J = II - 1; 36*9371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 37*9371c9d4SSatish Balay } 38*9371c9d4SSatish Balay if (j < n - 1) { 39*9371c9d4SSatish Balay J = II + 1; 40*9371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 41*9371c9d4SSatish Balay } 42*9371c9d4SSatish Balay v = 4.0; 43*9371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &II, &v, INSERT_VALUES)); 44c4762a1bSJed Brown } 45c4762a1bSJed Brown } 469566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 479566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 48c4762a1bSJed Brown #if defined(PETSC_USE_SOCKET_VIEWER) 499566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_SOCKET_WORLD)); 50c4762a1bSJed Brown #endif 519566063dSJacob Faibussowitsch PetscCall(VecCreateSeq(PETSC_COMM_SELF, m, &x)); 529566063dSJacob Faibussowitsch PetscCall(VecSet(x, one)); 53c4762a1bSJed Brown #if defined(PETSC_USE_SOCKET_VIEWER) 549566063dSJacob Faibussowitsch PetscCall(VecView(x, PETSC_VIEWER_SOCKET_WORLD)); 55c4762a1bSJed Brown #endif 56c4762a1bSJed Brown 579566063dSJacob Faibussowitsch PetscCall(PetscSleep(30)); 58c4762a1bSJed Brown 599566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x)); 609566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 619566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 62b122ec5aSJacob Faibussowitsch return 0; 63c4762a1bSJed Brown } 64c4762a1bSJed Brown 65c4762a1bSJed Brown /*TEST 66c4762a1bSJed Brown 67c4762a1bSJed Brown test: 68c4762a1bSJed Brown TODO: cannot test with socket viewer 69c4762a1bSJed Brown 70c4762a1bSJed Brown TEST*/ 71