Hi all, I'd like to apply a method to a finite element function (that is, something that looks like the solution vectors) in order to get another finite element function. For example, suppose my finite element function is a symmetric rank-2 tensor in type, and I would like a finite element function which is a vector of its eigenvalues. I haven't been able to find anything in the tutorials which do this (though maybe I'm skimming too much).
My naive approach would be to (i) construct a dealii Function which evaluates some finite element vector (function?) at a given point and then (ii) use the Interpolation or Projection functions from the VectorTools namespace. However, I am not sure whether Interpolation or Projection would be a better idea. Further, I don't know how to evaluate a finite element function at an arbitrary point -- only at quadrature points via the FEValues class. Also I would be unsure how to build that into a Function class. Let me know if there's a better way to do this -- it seems like something that's probably already implemented. Thanks so much, Lucas -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/f27e2ac3-a0bf-42a4-928b-41671a395680n%40googlegroups.com.
