1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatDiagonalSet() on MatLoad() matrix \n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat A; 9c4762a1bSJed Brown Vec x; 10c4762a1bSJed Brown PetscViewer fd; /* viewer */ 11c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 12c4762a1bSJed Brown PetscReal norm; 13c4762a1bSJed Brown PetscBool flg; 14c4762a1bSJed Brown 15*327415f7SBarry Smith PetscFunctionBeginUser; 169566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 17c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 189566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 1928b400f6SJacob Faibussowitsch PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 20c4762a1bSJed Brown 21c4762a1bSJed Brown /* Load matrix A */ 229566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd)); 239566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); 249566063dSJacob Faibussowitsch PetscCall(MatLoad(A,fd)); 259566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&fd)); 269566063dSJacob Faibussowitsch PetscCall(MatCreateVecs(A,&x,NULL)); 279566063dSJacob Faibussowitsch PetscCall(MatGetDiagonal(A,x)); 289566063dSJacob Faibussowitsch PetscCall(VecScale(x,-1.0)); 299566063dSJacob Faibussowitsch PetscCall(MatDiagonalSet(A,x,ADD_VALUES)); 309566063dSJacob Faibussowitsch PetscCall(MatGetDiagonal(A,x)); 319566063dSJacob Faibussowitsch PetscCall(VecNorm(x,NORM_2,&norm)); 329566063dSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Norm %g\n",(double)norm)); 33c4762a1bSJed Brown 34c4762a1bSJed Brown /* Free data structures */ 359566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 369566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x)); 379566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 38b122ec5aSJacob Faibussowitsch return 0; 39c4762a1bSJed Brown } 40c4762a1bSJed Brown 41c4762a1bSJed Brown /*TEST 42c4762a1bSJed Brown 43c4762a1bSJed Brown test: 44c4762a1bSJed Brown nsize: 4 45dfd57a17SPierre Jolivet requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES) 46c4762a1bSJed Brown args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/ns-real-int32-float64 -malloc_dump 47c4762a1bSJed Brown 48c4762a1bSJed Brown TEST*/ 49