2: static char help[] = "Tests MatSeq(B)AIJSetColumnIndices().\n\n";

  4: #include <petscmat.h>

  6: /*
  7:       Generate the following matrix:

  9:          1 0 3
 10:          1 2 3
 11:          0 0 3
 12: */
 15: int main(int argc,char **args)
 16: {
 17:   Mat            A;
 18:   PetscScalar    v;
 20:   PetscInt       i,j,rowlens[] = {2,3,1},cols[] = {0,2,0,1,2,2};
 21:   PetscBool      flg;

 23:   PetscInitialize(&argc,&args,(char*)0,help);

 25:   PetscOptionsHasName(NULL,NULL,"-baij",&flg);
 26:   if (flg) {
 27:     MatCreateSeqBAIJ(PETSC_COMM_WORLD,1,3,3,0,rowlens,&A);
 28:     MatSeqBAIJSetColumnIndices(A,cols);
 29:   } else {
 30:     MatCreateSeqAIJ(PETSC_COMM_WORLD,3,3,0,rowlens,&A);
 31:     MatSeqAIJSetColumnIndices(A,cols);
 32:   }

 34:   i    = 0; j = 0; v = 1.0;
 35:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);
 36:   i    = 0; j = 2; v = 3.0;
 37:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);

 39:   i    = 1; j = 0; v = 1.0;
 40:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);
 41:   i    = 1; j = 1; v = 2.0;
 42:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);
 43:   i    = 1; j = 2; v = 3.0;
 44:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);

 46:   i    = 2; j = 2; v = 3.0;
 47:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);

 49:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 50:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 51:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);

 53:   MatDestroy(&A);
 54:   PetscFinalize();
 55:   return 0;
 56: }