1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests MatDiagonalSet() on MatLoad() matrix \n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown #include <petscmat.h> 5*c4762a1bSJed Brown 6*c4762a1bSJed Brown int main(int argc,char **args) 7*c4762a1bSJed Brown { 8*c4762a1bSJed Brown Mat A; 9*c4762a1bSJed Brown Vec x; 10*c4762a1bSJed Brown PetscErrorCode ierr; 11*c4762a1bSJed Brown PetscViewer fd; /* viewer */ 12*c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 13*c4762a1bSJed Brown PetscReal norm; 14*c4762a1bSJed Brown PetscBool flg; 15*c4762a1bSJed Brown 16*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 17*c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 18*c4762a1bSJed Brown ierr = PetscOptionsGetString(NULL,NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr); 19*c4762a1bSJed Brown if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 20*c4762a1bSJed Brown 21*c4762a1bSJed Brown /* Load matrix A */ 22*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);CHKERRQ(ierr); 23*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 24*c4762a1bSJed Brown ierr = MatLoad(A,fd);CHKERRQ(ierr); 25*c4762a1bSJed Brown ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr); 26*c4762a1bSJed Brown ierr = MatCreateVecs(A,&x,NULL);CHKERRQ(ierr); 27*c4762a1bSJed Brown ierr = MatGetDiagonal(A,x);CHKERRQ(ierr); 28*c4762a1bSJed Brown ierr = VecScale(x,-1.0);CHKERRQ(ierr); 29*c4762a1bSJed Brown ierr = MatDiagonalSet(A,x,ADD_VALUES);CHKERRQ(ierr); 30*c4762a1bSJed Brown ierr = MatGetDiagonal(A,x);CHKERRQ(ierr); 31*c4762a1bSJed Brown ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr); 32*c4762a1bSJed Brown ierr = PetscPrintf(PETSC_COMM_WORLD,"Norm %g\n",(double)norm);CHKERRQ(ierr); 33*c4762a1bSJed Brown 34*c4762a1bSJed Brown /* Free data structures */ 35*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 36*c4762a1bSJed Brown ierr = VecDestroy(&x);CHKERRQ(ierr); 37*c4762a1bSJed Brown ierr = PetscFinalize(); 38*c4762a1bSJed Brown return ierr; 39*c4762a1bSJed Brown } 40*c4762a1bSJed Brown 41*c4762a1bSJed Brown 42*c4762a1bSJed Brown /*TEST 43*c4762a1bSJed Brown 44*c4762a1bSJed Brown test: 45*c4762a1bSJed Brown nsize: 4 46*c4762a1bSJed Brown requires: datafilespath !complex double !define(PETSC_USE_64BIT_INDICES) 47*c4762a1bSJed Brown args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/ns-real-int32-float64 -malloc_dump 48*c4762a1bSJed Brown 49*c4762a1bSJed Brown TEST*/ 50