1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests converting a matrix to another format with MatConvert().\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 7d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown Mat C, A; 9c4762a1bSJed Brown PetscInt i, j, m = 5, n = 4, Ii, J; 10c4762a1bSJed Brown PetscMPIInt rank, size; 11c4762a1bSJed Brown PetscScalar v; 12c4762a1bSJed Brown char mtype[256]; 13c4762a1bSJed Brown 14327415f7SBarry Smith PetscFunctionBeginUser; 159566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 169566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 17c4762a1bSJed Brown 18c4762a1bSJed Brown /* This example does not work correctly for np > 2 */ 199566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 20be096a46SBarry Smith PetscCheck(size <= 2, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "Use np <= 2"); 21c4762a1bSJed Brown 22c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 239566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &C)); 249566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 259566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 269566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 27c4762a1bSJed Brown for (i = 0; i < m; i++) { 28c4762a1bSJed Brown for (j = 2 * rank; j < 2 * rank + 2; j++) { 299371c9d4SSatish Balay v = -1.0; 309371c9d4SSatish Balay Ii = j + n * i; 319371c9d4SSatish Balay if (i > 0) { 329371c9d4SSatish Balay J = Ii - n; 339371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 349371c9d4SSatish Balay } 359371c9d4SSatish Balay if (i < m - 1) { 369371c9d4SSatish Balay J = Ii + n; 379371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 389371c9d4SSatish Balay } 399371c9d4SSatish Balay if (j > 0) { 409371c9d4SSatish Balay J = Ii - 1; 419371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 429371c9d4SSatish Balay } 439371c9d4SSatish Balay if (j < n - 1) { 449371c9d4SSatish Balay J = Ii + 1; 459371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 469371c9d4SSatish Balay } 479371c9d4SSatish Balay v = 4.0; 489371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 49c4762a1bSJed Brown } 50c4762a1bSJed Brown } 51c4762a1bSJed Brown 529566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 539566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 549566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_INFO)); 559566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 569566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 579566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 58c4762a1bSJed Brown 59*c6a7a370SJeremy L Thompson PetscCall(PetscStrncpy(mtype, MATSAME, sizeof(mtype))); 609566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-conv_mat_type", mtype, sizeof(mtype), NULL)); 619566063dSJacob Faibussowitsch PetscCall(MatConvert(C, mtype, MAT_INITIAL_MATRIX, &A)); 629566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_INFO)); 639566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD)); 649566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 659566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_IMPL)); 669566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD)); 679566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 68c4762a1bSJed Brown 69c4762a1bSJed Brown /* Free data structures */ 709566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 719566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 72c4762a1bSJed Brown 739566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 74b122ec5aSJacob Faibussowitsch return 0; 75c4762a1bSJed Brown } 76c4762a1bSJed Brown 77c4762a1bSJed Brown /*TEST 78c4762a1bSJed Brown 79c4762a1bSJed Brown test: 80c4762a1bSJed Brown args: -conv_mat_type seqaij 81c4762a1bSJed Brown 82c4762a1bSJed Brown TEST*/ 83