dolfin team mailing list archive

[Andy Ray Terrel <aterrel@xxxxxxxxxxxx>]

2009/3/16 Hatef Monajemi <hmonajem@xxxxxxxxxxxxxxxxxxx>:
> Hi,
>
> I would assume more than 2 elemnts should be O.K for ffc. However, I am
> getting some error while trying the following code:
>
> -----------------------------------
>
> P2 = VectorElement("Lagrange", "triangle", 1)
> P1 = FiniteElement("Lagrange", "triangle", 1)
> P3 = FiniteElement("Discontinuous Lagrange", "triangle", 0)
> TH = (P2 + P1)+ P3
^^^^^^^^^^^^^^^^^^^^^

To fix the trace back replace the above line with
TH = MixedElement(P2,P1,P3)

The above code creates a Mixed element like so ((v,w), q)

-- Andy

>
> (v,w,q) = TestFunctions(TH)
> (U,P,Tau) = TrialFunctions(TH)
>
>
>
> a1 =a1(U,P;v)
> a2 = a2(U,P;w)
> a3 = a3(Tau;q)
>
> a=a1+a2+a3
> ----------------------------------------------
>
> does anyone know what is wrong here?
>
> This is the error I am geting:
>
>  ****need more than 2 values to unpack
>
> I want to basically add a constant number on every element besides velocity
> and pressure on nodal points , That's why I used the P3 type of
> FiniteElement.
>
>
>
>
> Thanks ,
>
> H! at! ! ef
>
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