1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Test MatCreate() with MAT_STRUCTURE_ONLY .\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv) 7*d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown Mat mat; 9c4762a1bSJed Brown PetscInt m = 7, n, i, j, rstart, rend; 10c4762a1bSJed Brown PetscMPIInt size; 11c4762a1bSJed Brown PetscScalar v; 12c4762a1bSJed Brown PetscBool struct_only = PETSC_TRUE; 13c4762a1bSJed Brown 14327415f7SBarry Smith PetscFunctionBeginUser; 159566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 169566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 17be096a46SBarry Smith PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This is a uniprocessor example only!"); 18c4762a1bSJed Brown 199566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_COMMON)); 209566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 219566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetBool(NULL, NULL, "-struct_only", &struct_only, NULL)); 22c4762a1bSJed Brown n = m; 23c4762a1bSJed Brown 24c4762a1bSJed Brown /* ------- Assemble matrix, test MatValid() --------- */ 259566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &mat)); 269566063dSJacob Faibussowitsch PetscCall(MatSetSizes(mat, PETSC_DECIDE, PETSC_DECIDE, m, n)); 279566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(mat)); 281baa6e33SBarry Smith if (struct_only) PetscCall(MatSetOption(mat, MAT_STRUCTURE_ONLY, PETSC_TRUE)); 299566063dSJacob Faibussowitsch PetscCall(MatSetUp(mat)); 309566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(mat, &rstart, &rend)); 31c4762a1bSJed Brown for (i = rstart; i < rend; i++) { 32c4762a1bSJed Brown for (j = 0; j < n; j++) { 33c4762a1bSJed Brown v = 10.0 * i + j; 349566063dSJacob Faibussowitsch PetscCall(MatSetValues(mat, 1, &i, 1, &j, &v, INSERT_VALUES)); 35c4762a1bSJed Brown } 36c4762a1bSJed Brown } 379566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(mat, MAT_FINAL_ASSEMBLY)); 389566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(mat, MAT_FINAL_ASSEMBLY)); 399566063dSJacob Faibussowitsch PetscCall(MatView(mat, PETSC_VIEWER_STDOUT_WORLD)); 40c4762a1bSJed Brown 41c4762a1bSJed Brown /* Free data structures */ 429566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mat)); 439566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 44b122ec5aSJacob Faibussowitsch return 0; 45c4762a1bSJed Brown } 46c4762a1bSJed Brown 47c4762a1bSJed Brown /*TEST 48c4762a1bSJed Brown 49c4762a1bSJed Brown test: 50c4762a1bSJed Brown output_file: output/ex107.out 51c4762a1bSJed Brown 52c4762a1bSJed Brown test: 53c4762a1bSJed Brown suffix: 2 54c4762a1bSJed Brown args: -mat_type baij -mat_block_size 2 -m 10 55c4762a1bSJed Brown 56c4762a1bSJed Brown TEST*/ 57