[dune-pdelab] Inquiry

[Jared Okiro]

Thanks Joe for the information.
I now need to calculate the L_infinity error and L1_error for my problem.
I can see the function to use for L_infinity norm, but not sure of the
function to use
for the L1_error. Any advice please will be highly appreciated.
I am wishing everyone a nice long weekend.

Kind regards,
Jared

On Sun, Sep 25, 2011 at 11:27 AM, Jö Fahlke <jorrit at jorrit.de> wrote:

> Am Fri, 23. Sep 2011, 17:02:06 +0200 schrieb Jared Okiro:
> > I am requesting for clarification on the example code in the directory
> > dune-pdelab-howto/src/convection-diffusion/dgdiffusion.cc.
> > In the section for calculating the L2 error(commented), there is a line
> like
> > this:
> >
> > *typedef DifferenceSquaredAdapter<G,UDGF> DifferenceSquared;*
>
> Well, DifferenceSquaredAdapter is defined on line 85 in the same file.  It
> says there:
>
> | /*! \brief Adapter returning ||f1(x)-f2(x)||^2 for two given grid
> functions
> |
> |   \tparam T1  a grid function type
> |   \tparam T2  a grid function type
> | */
> | template<typename T1, typename T2>
> | class DifferenceSquaredAdapter
>
> So both template parameters must be Grid functions, one will usually be
> your
> computed solution, the other one a reference solution (for instance an
> analytic solution or a solution computed on a finer mesh).  "G" in the
> comment
> appears to be a misnomer, probably due to bitrot.
>
> Bye,
> Jö.
>
> --
> Jorrit (Jö) Fahlke, Interdisciplinary Center for Scientific Computing,
> Heidelberg University, Im Neuenheimer Feld 368, D-69120 Heidelberg
> Tel: +49 6221 54 8890 Fax: +49 6221 54 8884
>
> Der Horizont vieler Menschen ist ein Kreis mit Radius Null - und das
> nennen sie ihren Standpunkt.
> -- A. Einstein
>
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-- 
Jared Ouma Okiro,
Institute for Analysis and Numerics,
Otto-von- Guericke Universität,
Universitätsplatz 02, Gebaude 02 / 115
39106 Magdeburg, Germany
Office Tel: +493916712660
Fax:         +493916718073
Mobile:     +4917657479787
Home Tel: +4939155917376
Email:jared.okiro at st.ovgu.de
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