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 PetscErrorCode ierr; 11c4762a1bSJed Brown PetscViewer fd; /* viewer */ 12c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 13c4762a1bSJed Brown PetscReal norm; 14c4762a1bSJed Brown PetscBool flg; 15c4762a1bSJed Brown 16c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 17c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 18*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 192c71b3e2SJacob Faibussowitsch PetscCheckFalse(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 20c4762a1bSJed Brown 21c4762a1bSJed Brown /* Load matrix A */ 22*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd)); 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 24*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLoad(A,fd)); 25*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&fd)); 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateVecs(A,&x,NULL)); 27*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetDiagonal(A,x)); 28*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScale(x,-1.0)); 29*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDiagonalSet(A,x,ADD_VALUES)); 30*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetDiagonal(A,x)); 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecNorm(x,NORM_2,&norm)); 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"Norm %g\n",(double)norm)); 33c4762a1bSJed Brown 34c4762a1bSJed Brown /* Free data structures */ 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 36*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&x)); 37c4762a1bSJed Brown ierr = PetscFinalize(); 38c4762a1bSJed Brown return ierr; 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