[Dune] Questions on GnuplotWriter

[Christian Engwer]

Hi Alexander,

> I'm using the GnuplotWriter of dune-grid to output my results at the
> Vertex positions of my 2d grid calculated using
> Dune::PDELab::Pk2DLocalFiniteElementMap and addVertexData(u, name)
> where u is the resulting solution vector of the FEM procedure.
> 
> For k=1 this works perfectly as expected but for k>1 the assertion
> (t == vertexData && _is.size(GridView::dimension) == data.size())
> fails.
> However commenting out the assertion (of course loosing consistency)
> worked fine for my and I get the same vertex data as in vtk output.
> 
> Is there a generic mechanism behind so one could provide gnuplot
> output of vertex data even if the data container contains more
> information?
> 
> Second question is that it looks to me as if the limitation to 2d
> for vertex data is not necessary? At least for me it perfectly
> worked without changes for 3d grids as well.

what do you mean by "worked"? How are you visualizing 3d data with
gnuplot?

Christian