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 6*9371c9d4SSatish Balay int main(int argc, char **args) { 7c4762a1bSJed Brown Mat C, A; 8c4762a1bSJed Brown PetscInt i, j, m = 5, n = 4, Ii, J; 9c4762a1bSJed Brown PetscMPIInt rank, size; 10c4762a1bSJed Brown PetscScalar v; 11c4762a1bSJed Brown char mtype[256]; 12c4762a1bSJed Brown 13327415f7SBarry Smith PetscFunctionBeginUser; 149566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 159566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 16c4762a1bSJed Brown 17c4762a1bSJed Brown /* This example does not work correctly for np > 2 */ 189566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 19be096a46SBarry Smith PetscCheck(size <= 2, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "Use np <= 2"); 20c4762a1bSJed Brown 21c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 229566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &C)); 239566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 249566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 259566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 26c4762a1bSJed Brown for (i = 0; i < m; i++) { 27c4762a1bSJed Brown for (j = 2 * rank; j < 2 * rank + 2; j++) { 28*9371c9d4SSatish Balay v = -1.0; 29*9371c9d4SSatish Balay Ii = j + n * i; 30*9371c9d4SSatish Balay if (i > 0) { 31*9371c9d4SSatish Balay J = Ii - n; 32*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 33*9371c9d4SSatish Balay } 34*9371c9d4SSatish Balay if (i < m - 1) { 35*9371c9d4SSatish Balay J = Ii + n; 36*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 37*9371c9d4SSatish Balay } 38*9371c9d4SSatish Balay if (j > 0) { 39*9371c9d4SSatish Balay J = Ii - 1; 40*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 41*9371c9d4SSatish Balay } 42*9371c9d4SSatish Balay if (j < n - 1) { 43*9371c9d4SSatish Balay J = Ii + 1; 44*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 45*9371c9d4SSatish Balay } 46*9371c9d4SSatish Balay v = 4.0; 47*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 48c4762a1bSJed Brown } 49c4762a1bSJed Brown } 50c4762a1bSJed Brown 519566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 529566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 539566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_INFO)); 549566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 559566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 569566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 57c4762a1bSJed Brown 589566063dSJacob Faibussowitsch PetscCall(PetscStrcpy(mtype, MATSAME)); 599566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-conv_mat_type", mtype, sizeof(mtype), NULL)); 609566063dSJacob Faibussowitsch PetscCall(MatConvert(C, mtype, MAT_INITIAL_MATRIX, &A)); 619566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_INFO)); 629566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD)); 639566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 649566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_IMPL)); 659566063dSJacob Faibussowitsch PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD)); 669566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 67c4762a1bSJed Brown 68c4762a1bSJed Brown /* Free data structures */ 699566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 709566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 71c4762a1bSJed Brown 729566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 73b122ec5aSJacob Faibussowitsch return 0; 74c4762a1bSJed Brown } 75c4762a1bSJed Brown 76c4762a1bSJed Brown /*TEST 77c4762a1bSJed Brown 78c4762a1bSJed Brown test: 79c4762a1bSJed Brown args: -conv_mat_type seqaij 80c4762a1bSJed Brown 81c4762a1bSJed Brown TEST*/ 82