Kyusik,
I'm trying to calculate J_tor= x*solution+solution_max/y
solution is already calculated vector from 3 function (setup_system,
assemble_system, solve)
To do this calculation I added the following three function(setup_Jtor,
assmeble_Jtor, solve_Jtor)
[...]
This is one way to do it. You are just projecting J_tor to a finite
element space and use that for output or further processing. As others
have already noted, the only problem I can see is that computing
solution_max may be inaccurate. This is because in general, if you have
a finite element function
u_h(x) = \sum_i \varphi_i(x) U_i
then
max_{x \in \Omega} u_h(x)
is not the same as
max_i U_i
For (bi-,tri-)linear functions the two are the same but for higher order
finite elements, that is not the case.
If all you care about is to use the compute J_tor for graphical output,
then you can skip the projection and use the DataPostprocessor class
instead. This is certainly more efficient than what you do right now.
Best
W.
--
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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