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*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&args,(char*)0,help)); 16c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 175f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 1828b400f6SJacob Faibussowitsch PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 19c4762a1bSJed Brown 20c4762a1bSJed Brown /* Load matrix A */ 215f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd)); 225f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 235f80ce2aSJacob Faibussowitsch CHKERRQ(MatLoad(A,fd)); 245f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&fd)); 255f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateVecs(A,&x,NULL)); 265f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetDiagonal(A,x)); 275f80ce2aSJacob Faibussowitsch CHKERRQ(VecScale(x,-1.0)); 285f80ce2aSJacob Faibussowitsch CHKERRQ(MatDiagonalSet(A,x,ADD_VALUES)); 295f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetDiagonal(A,x)); 305f80ce2aSJacob Faibussowitsch CHKERRQ(VecNorm(x,NORM_2,&norm)); 315f80ce2aSJacob Faibussowitsch CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"Norm %g\n",(double)norm)); 32c4762a1bSJed Brown 33c4762a1bSJed Brown /* Free data structures */ 345f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 355f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&x)); 36*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 37*b122ec5aSJacob Faibussowitsch return 0; 38c4762a1bSJed Brown } 39c4762a1bSJed Brown 40c4762a1bSJed Brown /*TEST 41c4762a1bSJed Brown 42c4762a1bSJed Brown test: 43c4762a1bSJed Brown nsize: 4 44dfd57a17SPierre Jolivet requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES) 45c4762a1bSJed Brown args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/ns-real-int32-float64 -malloc_dump 46c4762a1bSJed Brown 47c4762a1bSJed Brown TEST*/ 48