Is there a way to somehow modify values of computed solution? Normally we’d do the following: u_n.assign(u) But what if I’d like to modify the solution u before assigning it? Example - multiply all values by 2, which obviously doesn’t work: u_n.assign(2*u) More advanced version would be how to…

Hey, you can do such things by directly working on the dof values of the Function. For your example, this would look as follows u_n.vector()[:] = 2*u.vector()[:] Note that this works dof wise, and gives the correct result for Lagrangian elements. For other element types (or more complex modificati…

I’m doing something similar using version 2019.1.0. I’m replying to this post because I believe there may be a bug in assigning a subspace of a vector function space. I find that assigning a subspace will not work; you need to assign the entire vector function space simultaneously. I’m finding that…

Modifying and assigning solution

I/O

dokken May 6, 2020, 9:35pm 4

For vector-spaces, and mixed spaces, you should use FunctionAssigner, see for instance this test on how to assign to a vector space

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Modifying and assigning solution

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