1c4762a1bSJed Brown static char help[] = "Test MatCreate() with MAT_STRUCTURE_ONLY .\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv) 6d71ae5a4SJacob Faibussowitsch { 7c4762a1bSJed Brown Mat mat; 8c4762a1bSJed Brown PetscInt m = 7, n, i, j, rstart, rend; 9c4762a1bSJed Brown PetscMPIInt size; 10c4762a1bSJed Brown PetscScalar v; 11c4762a1bSJed Brown PetscBool struct_only = PETSC_TRUE; 12c4762a1bSJed Brown 13327415f7SBarry Smith PetscFunctionBeginUser; 14*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 159566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 16be096a46SBarry Smith PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This is a uniprocessor example only!"); 17c4762a1bSJed Brown 189566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_COMMON)); 199566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 209566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetBool(NULL, NULL, "-struct_only", &struct_only, NULL)); 21c4762a1bSJed Brown n = m; 22c4762a1bSJed Brown 23c4762a1bSJed Brown /* ------- Assemble matrix, test MatValid() --------- */ 249566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &mat)); 259566063dSJacob Faibussowitsch PetscCall(MatSetSizes(mat, PETSC_DECIDE, PETSC_DECIDE, m, n)); 269566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(mat)); 271baa6e33SBarry Smith if (struct_only) PetscCall(MatSetOption(mat, MAT_STRUCTURE_ONLY, PETSC_TRUE)); 289566063dSJacob Faibussowitsch PetscCall(MatSetUp(mat)); 299566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(mat, &rstart, &rend)); 30c4762a1bSJed Brown for (i = rstart; i < rend; i++) { 31c4762a1bSJed Brown for (j = 0; j < n; j++) { 32c4762a1bSJed Brown v = 10.0 * i + j; 339566063dSJacob Faibussowitsch PetscCall(MatSetValues(mat, 1, &i, 1, &j, &v, INSERT_VALUES)); 34c4762a1bSJed Brown } 35c4762a1bSJed Brown } 369566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(mat, MAT_FINAL_ASSEMBLY)); 379566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(mat, MAT_FINAL_ASSEMBLY)); 389566063dSJacob Faibussowitsch PetscCall(MatView(mat, PETSC_VIEWER_STDOUT_WORLD)); 39c4762a1bSJed Brown 40c4762a1bSJed Brown /* Free data structures */ 419566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mat)); 429566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 43b122ec5aSJacob Faibussowitsch return 0; 44c4762a1bSJed Brown } 45c4762a1bSJed Brown 46c4762a1bSJed Brown /*TEST 47c4762a1bSJed Brown 48c4762a1bSJed Brown test: 49c4762a1bSJed Brown output_file: output/ex107.out 50c4762a1bSJed Brown 51c4762a1bSJed Brown test: 52c4762a1bSJed Brown suffix: 2 53c4762a1bSJed Brown args: -mat_type baij -mat_block_size 2 -m 10 54c4762a1bSJed Brown 55c4762a1bSJed Brown TEST*/ 56