# [deal.II] Re: Solution Components of a Vector valued problem

```Dear Lisa,

You should have a look at some of the previous discussions on the use of
the cell->vertex_dof_index
function
(as well as its documentation
<https://www.dealii.org/developer/doxygen/deal.II/classDoFAccessor.html#a5560151b5407e4851d5c1009c7753764>);

this provides an easy link between vertices and degrees of freedom.```
```
Regards,
J-P

On Friday, October 14, 2016 at 1:20:29 PM UTC+2, Lisa Collins wrote:
>
> Hallo,
> Thanks for both replies.
> In general, from a solution vector, how can I extract u_x, u_y, and T
> nodal values corresponding to a specific node?
> Best regards.
> Lisa
>
> On Thursday, October 13, 2016 at 1:05:08 PM UTC+2, Lisa Collins wrote:
>>
>> Hello,
>>
>> Dealing with vector valued problems in deal ii is a bit confusing for me.
>> I have a question regarding the solution vector (S).
>> If we have a problem with 20 nodes and 3 dofs per node (u_x , u_y , and T
>> temperature) can we always say that:
>>
>> S[0] = u_x of node A
>> S[1] = u_y of node A
>> S[2] = T of node A
>>
>> S[3] = u_x of node B
>> S[4] = u_y of node B
>> S[5] = T of node B
>>
>> and so on.
>>
>> Thanks.
>> Lisa
>>
>

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