Re: [Libmesh-users] Norm of a NumericVector for specific variable...

[Derek G. <fri...@gm...>]

On Nov 5, 2008, at 4:09 PM, Roy Stogner wrote:

> In fact, I think we'll want to hand this norm off to NumericVector in
> the end too, providing it with a cloned NumericVector whose
> coefficients are set to the proper weights given in the SystemNorm, so
> it just has to call the linear algebra package to pointwise multiply
> and then take a norm.

This makes sense to me.

>> So... now my question is... is there a way to get a list of all of  
>> the DofIndices for a variable on a processor?  Or am I going to  
>> have to loop over each element calling dof_map->dof_indices() and  
>> passing in the variable to build up this list?
>
> I don't see any way, no.  Maybe Ben knows of something I'm forgetting.

Hopefully.

> But at least you won't have to loop over *every* element - you just
> need to know which local DoFs belong to your variable.

Right... just loop over local elements.

Well... I guess I'll start writing something...

Derek