dolfin team mailing list archive

[Kristian Oelgaard <k.b.oelgaard@xxxxxxxxxx>]

Quoting Anders Logg <logg@xxxxxxxxx>:

> This should be fixed now.
> 
> I wasn't able to compile 1D vector elements. Looks like a bug in FFC.

Depends how you look at it. If you do:

element = VectorElement("Lagrange", "interval", 2)

FFC will try to generate a vector element with just cell_dimension = 1 component
i.e. effectively a FiniteElement (this will fail because MixedElement expects a
list).

If you do e.g.,

element = VectorElement("Lagrange", "interval", 2, 3)

things work fine.

We could modify VectorElement to return the FiniteElement for the special case
of shape = "interval" and no specified number of components, but on the other
hand I think it is more logical if it doesn't work.

Kristian

> Kristian, do you know what this can be?
> 
> -- 
> Anders
> 
> 
> On Fri, Apr 11, 2008 at 12:57:34PM +0200, Ola Skavhaug wrote:
> > I'm forwarding this to the dolfin-dev list.
> > 
> > Ola
> > 
> 
> > Date: Fri, 11 Apr 2008 12:29:03 +0200
> > From: Dag Lindbo <dag@xxxxxxxxxx>
> > To: Ola Skavhaug <skavhaug@xxxxxxxxx>
> > Subject: Re: 1D plotting in Viper
> > 
> > Ola,
> > it does not seem like PyDOLFIN can read back 1D functions. I got an error 
> > when doing:
> > u = Function("poisson.xml")
> > RuntimeError: *** Error: Unable to find finite element in library: 
> > "Lagrange finite element of degree 1 on a interval"
> >
> > /Dag
> 
> > _______________________________________________
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> > DOLFIN-dev@xxxxxxxxxx
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> 
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