Actual source code: ex61.c


  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: */
 13: int main(int argc,char **args)
 14: {
 15:   Mat            A;
 16:   PetscScalar    v;
 17:   PetscInt       i,j,rowlens[] = {2,3,1},cols[] = {0,2,0,1,2,2};
 18:   PetscBool      flg;

 20:   PetscInitialize(&argc,&args,(char*)0,help);
 21:   PetscOptionsHasName(NULL,NULL,"-baij",&flg);
 22:   if (flg) {
 23:     MatCreateSeqBAIJ(PETSC_COMM_WORLD,1,3,3,0,rowlens,&A);
 24:     MatSeqBAIJSetColumnIndices(A,cols);
 25:   } else {
 26:     MatCreateSeqAIJ(PETSC_COMM_WORLD,3,3,0,rowlens,&A);
 27:     MatSeqAIJSetColumnIndices(A,cols);
 28:   }

 30:   i    = 0; j = 0; v = 1.0;
 31:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);
 32:   i    = 0; j = 2; v = 3.0;
 33:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);

 35:   i    = 1; j = 0; v = 1.0;
 36:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);
 37:   i    = 1; j = 1; v = 2.0;
 38:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);
 39:   i    = 1; j = 2; v = 3.0;
 40:   MatSetValues(A,1,&i,1,&j,&v,INSERT_VALUES);

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

 45:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 46:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 47:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);

 49:   MatDestroy(&A);
 50:   PetscFinalize();
 51:   return 0;
 52: }

 54: /*TEST

 56:    test:

 58:    test:
 59:       suffix: 2
 60:       args: -baij

 62: TEST*/