1 static char help[] = "Testing PtAP for SeqMAIJ matrix, P, with SeqAIJ matrix, A.\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc,char **argv) 6 { 7 Mat pA,P,aijP; 8 PetscScalar pa[]={1.,-1.,0.,0.,1.,-1.,0.,0.,1.}; 9 PetscInt i,pij[]={0,1,2}; 10 PetscInt aij[3][3]={{0,1,2},{3,4,5},{6,7,8}}; 11 Mat A,mC,C; 12 PetscScalar one=1.; 13 PetscErrorCode ierr; 14 PetscMPIInt size; 15 16 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 17 ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 18 if (size != 1) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"This is a uniprocessor example only!"); 19 20 /* Create MAIJ matrix, P */ 21 ierr = MatCreate(PETSC_COMM_SELF,&pA);CHKERRQ(ierr); 22 ierr = MatSetSizes(pA,3,3,3,3);CHKERRQ(ierr); 23 ierr = MatSetType(pA,MATSEQAIJ);CHKERRQ(ierr); 24 ierr = MatSetUp(pA);CHKERRQ(ierr); 25 ierr = MatSetOption(pA,MAT_IGNORE_ZERO_ENTRIES,PETSC_TRUE);CHKERRQ(ierr); 26 ierr = MatSetValues(pA,3,pij,3,pij,pa,ADD_VALUES);CHKERRQ(ierr); 27 ierr = MatAssemblyBegin(pA,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 28 ierr = MatAssemblyEnd(pA,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 29 ierr = MatCreateMAIJ(pA,3,&P);CHKERRQ(ierr); 30 ierr = MatDestroy(&pA);CHKERRQ(ierr); 31 32 /* Create AIJ equivalent matrix, aijP, for comparison testing */ 33 ierr = MatConvert(P,MATSEQAIJ,MAT_INITIAL_MATRIX,&aijP);CHKERRQ(ierr); 34 35 /* Create AIJ matrix, A */ 36 ierr = MatCreate(PETSC_COMM_SELF,&A);CHKERRQ(ierr); 37 ierr = MatSetSizes(A,9,9,9,9);CHKERRQ(ierr); 38 ierr = MatSetType(A,MATSEQAIJ);CHKERRQ(ierr); 39 ierr = MatSetUp(A);CHKERRQ(ierr); 40 ierr = MatSetOption(A,MAT_IGNORE_ZERO_ENTRIES,PETSC_TRUE);CHKERRQ(ierr); 41 ierr = MatSetValues(A,3,aij[0],3,aij[0],pa,ADD_VALUES);CHKERRQ(ierr); 42 ierr = MatSetValues(A,3,aij[1],3,aij[1],pa,ADD_VALUES);CHKERRQ(ierr); 43 ierr = MatSetValues(A,3,aij[2],3,aij[2],pa,ADD_VALUES);CHKERRQ(ierr); 44 for (i=0; i<9; i++) { 45 ierr = MatSetValue(A,i,i,one,ADD_VALUES);CHKERRQ(ierr); 46 } 47 ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 48 ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 49 50 /* Perform PtAP_SeqAIJ_SeqMAIJ */ 51 ierr = MatPtAP(A,P,MAT_INITIAL_MATRIX,1.,&mC);CHKERRQ(ierr); 52 ierr = MatPtAP(A,P,MAT_REUSE_MATRIX,1.,&mC);CHKERRQ(ierr); 53 ierr = MatView(mC,PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr); 54 55 /* Perform PtAP_SeqAIJ_SeqAIJ for comparison testing */ 56 ierr = MatPtAP(A,aijP,MAT_INITIAL_MATRIX,1.,&C);CHKERRQ(ierr); 57 ierr = MatView(C,PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr); 58 59 /* Check mC = C */ 60 ierr = MatAXPY(C,-1.0,mC,DIFFERENT_NONZERO_PATTERN);CHKERRQ(ierr); 61 /* Note: We should be able to use SAME_NONZERO_PATTERN on the line above, */ 62 /* but don't because this flag doesn't assist testing. */ 63 ierr = MatView(C,PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr); 64 65 /* Cleanup */ 66 ierr = MatDestroy(&P);CHKERRQ(ierr); 67 ierr = MatDestroy(&aijP);CHKERRQ(ierr); 68 ierr = MatDestroy(&A);CHKERRQ(ierr); 69 ierr = MatDestroy(&C);CHKERRQ(ierr); 70 ierr = MatDestroy(&mC);CHKERRQ(ierr); 71 ierr = PetscFinalize(); 72 return ierr; 73 } 74 75 76 /*TEST 77 78 test: 79 output_file: output/ex101.out 80 81 TEST*/ 82