1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatTranspose()\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C,A; 9c4762a1bSJed Brown PetscScalar v; 10c4762a1bSJed Brown PetscInt i,j,m = 4,n = 4,Ii,J,Istart,Iend; 11c4762a1bSJed Brown PetscMPIInt rank,size; 12c4762a1bSJed Brown PetscBool equal=PETSC_FALSE; 13c4762a1bSJed Brown 14*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 15*9566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 16*9566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 17c4762a1bSJed Brown 18*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 19c4762a1bSJed Brown n = m; 20c4762a1bSJed Brown 21*9566063dSJacob Faibussowitsch PetscCall(MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n,5,NULL,5,NULL,&C)); 22c4762a1bSJed Brown 23c4762a1bSJed Brown /* create the symmetric matrix for the five point stencil */ 24*9566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C,&Istart,&Iend)); 25c4762a1bSJed Brown for (Ii=Istart; Ii<Iend; Ii++) { 26c4762a1bSJed Brown v = -1.0; i = Ii/n; j = Ii - i*n; 27*9566063dSJacob Faibussowitsch if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 28*9566063dSJacob Faibussowitsch if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 29*9566063dSJacob Faibussowitsch if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 30*9566063dSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 31*9566063dSJacob Faibussowitsch v = 4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 32c4762a1bSJed Brown } 33*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 34*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 35c4762a1bSJed Brown 36*9566063dSJacob Faibussowitsch PetscCall(MatTranspose(C,MAT_INITIAL_MATRIX,&A)); 37c4762a1bSJed Brown 38*9566063dSJacob Faibussowitsch PetscCall(MatEqual(C,A,&equal)); 3928b400f6SJacob Faibussowitsch PetscCheck(equal,PETSC_COMM_SELF,PETSC_ERR_SUP,"C != C^T"); 40c4762a1bSJed Brown 41*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 42*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 43*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 44b122ec5aSJacob Faibussowitsch return 0; 45c4762a1bSJed Brown } 46c4762a1bSJed Brown 47c4762a1bSJed Brown /*TEST 48c4762a1bSJed Brown 49c4762a1bSJed Brown test: 50c4762a1bSJed Brown 51c4762a1bSJed Brown TEST*/ 52