1 2 static char help[] = "Tests MatTranspose()\n\n"; 3 4 #include <petscmat.h> 5 6 int main(int argc,char **args) 7 { 8 Mat C,A; 9 PetscScalar v; 10 PetscInt i,j,m = 4,n = 4,Ii,J,Istart,Iend; 11 PetscMPIInt rank,size; 12 PetscErrorCode ierr; 13 PetscBool equal=PETSC_FALSE; 14 15 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 16 ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr); 17 ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 18 19 ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 20 n = m; 21 22 ierr = MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n,5,NULL,5,NULL,&C);CHKERRQ(ierr); 23 24 /* create the symmetric matrix for the five point stencil */ 25 ierr = MatGetOwnershipRange(C,&Istart,&Iend);CHKERRQ(ierr); 26 for (Ii=Istart; Ii<Iend; Ii++) { 27 v = -1.0; i = Ii/n; j = Ii - i*n; 28 if (i>0) {J = Ii - n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 29 if (i<m-1) {J = Ii + n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 30 if (j>0) {J = Ii - 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 31 if (j<n-1) {J = Ii + 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 32 v = 4.0; ierr = MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES);CHKERRQ(ierr); 33 } 34 ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 35 ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 36 37 ierr = MatTranspose(C,MAT_INITIAL_MATRIX,&A);CHKERRQ(ierr); 38 39 ierr = MatEqual(C,A,&equal);CHKERRQ(ierr); 40 if (!equal) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"C != C^T"); 41 42 ierr = MatDestroy(&C);CHKERRQ(ierr); 43 ierr = MatDestroy(&A);CHKERRQ(ierr); 44 ierr = PetscFinalize(); 45 return ierr; 46 } 47 48 49 /*TEST 50 51 test: 52 53 TEST*/ 54