Hi there After some time away I have once again been able to try and get do grips with dolfin. By a bit of a round about way I was able to solve a magnetic-field based eigenvalue problem giving me the cutoff wavenumbers for a square waveguide structure - it is still, however, a work in progress.
One question I do have is regarding the visualization of the results I have obtained. To this end I have two questions - the first is simply the visualization of the basis functions (vector Nedelec) themselves (see the attached image taken from Finite Element Method for Electromagnetics by Volakis et al) - how could this be achieved in dolfin? Put another way - how can I set the coefficient for a single basis function equal to 1 and zero the rest and display the result? Then the second question builds on this. If I have the coefficients associated with all the basis functions in a system, how would I set up a function to calculate the weighted sum of the vector basis functions anywhere in the mesh? I am using pydolfin. If anything is unclear, please contact me so that I can clarify matters. Evan
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