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: