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 PetscBool equal=PETSC_FALSE; 13 14 PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 15 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 16 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 17 18 PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 19 n = m; 20 21 PetscCall(MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n,5,NULL,5,NULL,&C)); 22 23 /* create the symmetric matrix for the five point stencil */ 24 PetscCall(MatGetOwnershipRange(C,&Istart,&Iend)); 25 for (Ii=Istart; Ii<Iend; Ii++) { 26 v = -1.0; i = Ii/n; j = Ii - i*n; 27 if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 28 if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 29 if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 30 if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 31 v = 4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 32 } 33 PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 34 PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 35 36 PetscCall(MatTranspose(C,MAT_INITIAL_MATRIX,&A)); 37 38 PetscCall(MatEqual(C,A,&equal)); 39 PetscCheck(equal,PETSC_COMM_SELF,PETSC_ERR_SUP,"C != C^T"); 40 41 PetscCall(MatDestroy(&C)); 42 PetscCall(MatDestroy(&A)); 43 PetscCall(PetscFinalize()); 44 return 0; 45 } 46 47 /*TEST 48 49 test: 50 51 TEST*/ 52