On 09/02/2016 06:07 AM, Bryukhanov Ilya wrote:
I want to change the solution vector (for example displacement vector from
step-8 and step-18) by the vector
that depends on the point. I want to iterate over all vertexes and add to each
solution component some value
that is a function of the vertex coordinate.
How can I do it in dealii?
It sounds like you have a solution u_h(x) and you want to add to it a function
v_h(x) that you know at each vertex location, i.e., it *interpolates* a
continuous function v(x) that you know.
If put this way, I would suggest you call
VectorTools::interpolate
on v(x) to get the nodal values V of v_h(x), and then add V to your solution
vector U.
I think that ought to be easier than what you suggest (though internally it
does exactly that).
Best
W.
--
Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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