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*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 7*d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown PetscInt m = 4, n = 5, i, j, II, J; 9c4762a1bSJed Brown PetscScalar one = 1.0, v; 10c4762a1bSJed Brown Vec x; 11c4762a1bSJed Brown Mat A; 12c4762a1bSJed Brown 13327415f7SBarry Smith PetscFunctionBeginUser; 149566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 159566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 169566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL)); 17c4762a1bSJed Brown 189566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 199566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 209566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(A)); 219566063dSJacob Faibussowitsch PetscCall(MatSetUp(A)); 22c4762a1bSJed Brown 23c4762a1bSJed Brown for (i = 0; i < m; i++) { 24c4762a1bSJed Brown for (j = 0; j < n; j++) { 259371c9d4SSatish Balay v = -1.0; 269371c9d4SSatish Balay II = j + n * i; 279371c9d4SSatish Balay if (i > 0) { 289371c9d4SSatish Balay J = II - n; 299371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 309371c9d4SSatish Balay } 319371c9d4SSatish Balay if (i < m - 1) { 329371c9d4SSatish Balay J = II + n; 339371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 349371c9d4SSatish Balay } 359371c9d4SSatish Balay if (j > 0) { 369371c9d4SSatish Balay J = II - 1; 379371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 389371c9d4SSatish Balay } 399371c9d4SSatish Balay if (j < n - 1) { 409371c9d4SSatish Balay J = II + 1; 419371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &J, &v, INSERT_VALUES)); 429371c9d4SSatish Balay } 439371c9d4SSatish Balay v = 4.0; 449371c9d4SSatish Balay PetscCall(MatSetValues(A, 1, &II, 1, &II, &v, INSERT_VALUES)); 45c4762a1bSJed Brown } 46c4762a1bSJed Brown } 479566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 489566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 49c4762a1bSJed Brown #if defined(PETSC_USE_SOCKET_VIEWER) 509566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_SOCKET_WORLD)); 51c4762a1bSJed Brown #endif 529566063dSJacob Faibussowitsch PetscCall(VecCreateSeq(PETSC_COMM_SELF, m, &x)); 539566063dSJacob Faibussowitsch PetscCall(VecSet(x, one)); 54c4762a1bSJed Brown #if defined(PETSC_USE_SOCKET_VIEWER) 559566063dSJacob Faibussowitsch PetscCall(VecView(x, PETSC_VIEWER_SOCKET_WORLD)); 56c4762a1bSJed Brown #endif 57c4762a1bSJed Brown 589566063dSJacob Faibussowitsch PetscCall(PetscSleep(30)); 59c4762a1bSJed Brown 609566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x)); 619566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 629566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 63b122ec5aSJacob Faibussowitsch return 0; 64c4762a1bSJed Brown } 65c4762a1bSJed Brown 66c4762a1bSJed Brown /*TEST 67c4762a1bSJed Brown 68c4762a1bSJed Brown test: 69c4762a1bSJed Brown TODO: cannot test with socket viewer 70c4762a1bSJed Brown 71c4762a1bSJed Brown TEST*/ 72