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[James Avery <question158276@xxxxxxxxxxxxxxxxxxxxx>]

New question #158276 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/158276

Dear all,

I'm having a bit of difficulty finding out how, given a finite element
function 

  f(x) = \sum_{i=1}^{Ndof} a_i \phi_i(x)

defined on a particular finite element space, one may obtain:

 1. The coefficients a_i, and
 2. The nodal positions x_j s.t. \phi_i(x_j) = \delta_{ij}.

where the \phi_i are the nodal basis functions / shape
functions.  Given an FE-function, the coefficients and nodal positions
should be readily available without any additional computation, but
for some reason I can't figure out where to find them. 

Any help would be appreciated.

With many kind regards,


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