Hi Bärbel, thanks for your fast reply. But both solutions are neither on the same mesh, nor is there any subset relation between the meshes. On the other hand, I could try to generate a triangulation for the "exact" solution, use your idea and generate a Function<dim> object there, then use SolutionTransfer between the two meshes, and then compare them via integrate_difference?! Maybe there is something simpler than that?
Thanks again, Jochen Am Dienstag, den 22.02.2011, 13:36 +0100 schrieb Bärbel Janssen: > Hi Jochen, > > why don't you try to integrate the difference against the > ZeroFunction<dim>? That means you have to have the "exact" and the > computed solution on the same mesh. > > Best, Bärbel > > -- > Bärbel Janssen > Institut für Angewandte Mathematik > Universität Heidelberg > > Im Neuenheimer Feld 293, Raum 213 > Telefon: +49 6221 54-5449 > > > On Tue, 22 Feb 2011, Jochen Abhau wrote: > > > Hello, > > > > is there a library function to generate a Function<dim> object out of > > sampled function values (plus some interpolation method)? > > Background: I want to compare the finite element solution of some PDE to > > another solution (obtained by different techniques). The other solution > > is given by function values on points and shall be regarded as "exact" > > solution. Now I want to use the integrate_difference method. > > > > Thanks in advance. > > Best regards. > > Jochen > > > > _______________________________________________ > > dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii > > _______________________________________________ dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii
