Chucui,
For Question 1, I write a code to compute the L2 norm of (solution_1 -
> solution_2):
> [...]
>
> Is that right?
>
You can just take the difference of the two variables and use
VectorTools::integrate_difference with a Functions::ZeroFunction as "exact
solution".
>
> For question 2, as the 2 solution vectors have different sizes, we don't
> have the same cells, so the cell loop cannot compute altogether:
> typename DoFHandler<dim>::active_cell_iterator
> cell_1 = dof_handler_1.begin_active(),
> endc_1 = dof_handler_1.end();
> typename DoFHandler<dim>::active_cell_iterator
> cell_2 = dof_handler_2.begin_active();
> for (; cell_1!=endc_2; ++cell_1, ++cell_2)
> {....}
>
> I wander how to solve this problem?
>
You need to interpolate the solution computed on the coarser mesh to the
finer mesh using
SolutionTransfer(https://www.dealii.org/current/doxygen/deal.II/classSolutionTransfer.html,
explained e.g. in
https://www.dealii.org/current/doxygen/deal.II/step_26.html). Then, you can
take the difference just as in your first question.
Best,
Daniel
--
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see
https://groups.google.com/d/forum/dealii?hl=en
---
You received this message because you are subscribed to the Google Groups
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to dealii+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
