Actual source code: ex38.c

  1: /*$Id: ex38.c,v 1.18 2001/08/07 21:30:08 bsmith Exp $*/

  3: static char help[] = "Tests MatSetValues() for column oriented storage.\n\n";

 5:  #include petscmat.h

  9: int main(int argc,char **args)
 10: {
 11:   Mat         C;
 12:   int         i,n = 5,midx[3],nidx[2],ierr;
 13:   PetscTruth  flg;
 14:   PetscScalar v[6];

 16:   PetscInitialize(&argc,&args,(char *)0,help);
 17:   PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);

 19:   MatCreate(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n,n,&C);
 20:   MatSetFromOptions(C);

 22:   PetscOptionsHasName(PETSC_NULL,"-column_oriented",&flg);
 23:   if (flg) {MatSetOption(C,MAT_COLUMN_ORIENTED);}
 24:   for (i=0; i<6; i++) v[i] = (PetscReal)i;
 25:   midx[0] = 0; midx[1] = 2; midx[2] = 3;
 26:   nidx[0] = 1; nidx[1] = 3;
 27:   MatSetValues(C,3,midx,2,nidx,v,ADD_VALUES);
 28:   MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
 29:   MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);

 31:   MatView(C,PETSC_VIEWER_STDOUT_WORLD);

 33:   MatDestroy(C);
 34:   PetscFinalize();
 35:   return 0;
 36: }

 38: