1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Test MatCreate() with MAT_STRUCTURE_ONLY .\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **argv) 7c4762a1bSJed Brown { 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 149566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 159566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 16*be096a46SBarry 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)); 27c4762a1bSJed Brown if (struct_only) { 289566063dSJacob Faibussowitsch PetscCall(MatSetOption(mat,MAT_STRUCTURE_ONLY,PETSC_TRUE)); 29c4762a1bSJed Brown } 309566063dSJacob Faibussowitsch PetscCall(MatSetUp(mat)); 319566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(mat,&rstart,&rend)); 32c4762a1bSJed Brown for (i=rstart; i<rend; i++) { 33c4762a1bSJed Brown for (j=0; j<n; j++) { 34c4762a1bSJed Brown v = 10.0*i+j; 359566063dSJacob Faibussowitsch PetscCall(MatSetValues(mat,1,&i,1,&j,&v,INSERT_VALUES)); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } 389566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY)); 399566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY)); 409566063dSJacob Faibussowitsch PetscCall(MatView(mat,PETSC_VIEWER_STDOUT_WORLD)); 41c4762a1bSJed Brown 42c4762a1bSJed Brown /* Free data structures */ 439566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mat)); 449566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 45b122ec5aSJacob Faibussowitsch return 0; 46c4762a1bSJed Brown } 47c4762a1bSJed Brown 48c4762a1bSJed Brown /*TEST 49c4762a1bSJed Brown 50c4762a1bSJed Brown test: 51c4762a1bSJed Brown output_file: output/ex107.out 52c4762a1bSJed Brown 53c4762a1bSJed Brown test: 54c4762a1bSJed Brown suffix: 2 55c4762a1bSJed Brown args: -mat_type baij -mat_block_size 2 -m 10 56c4762a1bSJed Brown 57c4762a1bSJed Brown TEST*/ 58