[dune-functions] Problems writing vector-valued vtk files

[Carsten Gräser]

Am 18.03.2015 um 16:13 schrieb Oliver Sander:
>>> One could argue that it is called ...scalar... because it uses scalar bases,
>>> even to create vector-valued functions.  I'm not perfectly sure that this is
>>> a good long-term point of view.
>> In the long-term we should get rid of 'scalar'. The only thing
>> to specify is how to multiply coefficients and values of the local
>> basis. Maybe we can factor this out in a first step such that one
>> can povide this as a lambda.
> 
> I've been thinking along the same lines.  Getting rid of the 'scalar' would be nice;
> the users shouldn't have to worry about scalar and nonscalar bases too much.
I'm afraid he has to. Because if coefficients and basis functions are
vector-valued, there's no longer a canonical range type for the
function. It get's even worse, for matrix valued coefficents.

Best,
Carsten

> 
>>
>> For the moment I've implemented support for vector/matrix-valued
>> coefficients only.
> 
> Works-for-me, thanks!
> 
>>
>> Best,
>> Carsten
>>
>> BTW:
>> Generic multiplication of various matrix/vector/scalar
>> combinations is something we've put a significant amount of
>> work into in dune-fufem.



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