Thank you very much. I have been trying and I only get the real part of the solution and it seems not to be right so far. Would be possible to make it work for complex numbers?
Thank you H. El vie, 27 ago 2021 a las 9:33, 'peterrum' via deal.II User Group (< dealii@googlegroups.com>) escribió: > Hi Hermes, > > I have extended the documentation a bit. See > https://github.com/dealii/dealii/pull/12714. > > Maybe you could give us a short feedback if `VectorTools::point_values()` > is working for complex numbers. If this is not the case, we can extend the > function for this use case. > > PM > > On Tuesday, 24 August 2021 at 15:39:49 UTC+2 peterrum wrote: > >> You need to pass a vector of points. >> >> PM >> >> On Tuesday, 24 August 2021 at 15:26:05 UTC+2 hermes...@gmail.com wrote: >> >>> Thank you. >>> >>> Doing something similar: >>> >>> *const* MappingQ1<dim> mapping; >>> >>> Utilities::MPI::RemotePointEvaluation<dim> evaluation_cache; >>> >>> VectorTools::point_values<dim>(mapping, dof_handler, >>> locally_relevant_solution, Point<2>(0.2, 0.2), evaluation_cache); >>> >>> >>> I get the following error: >>> >>> error: no matching function for call to 'point_values' >>> >>> VectorTools::point_values<dim>(mapping, dof_handler, >>> locally_relevant_solution, Point<2>(0.2, 0.2), evaluation_cache); >>> >>> >>> >>> I checked the parameters and seems to be ok. What can be producing the >>> error? >>> >>> Thank you again >>> >>> H >>> >>> El mar, 24 ago 2021 a las 14:59, 'peterrum' via deal.II User Group (< >>> dea...@googlegroups.com>) escribió: >>> >>>> Hi Hermes, >>>> >>>> You don't need to do anything regarding the setup (it is done within >>>> the function). Just take at a look at: >>>> https://github.com/dealii/dealii/blob/44b6aadb35aca2333e4bfb6c9ce29c613f4dc9e9/tests/remote_point_evaluation/vector_tools_evaluate_at_points_01.cc#L214-L216 >>>> >>>> I'll extend the documentation with an example today or tomorrow! >>>> >>>> Hope that helps, >>>> PM >>>> >>>> On Tuesday, 24 August 2021 at 14:46:46 UTC+2 hermes...@gmail.com wrote: >>>> >>>>> Thank you for pointing that function. >>>>> >>>>> I am having some problems when creating the mapping and I am not sure >>>>> if the function call is right. Could you please help me with that? >>>>> >>>>> std::vector<*double*> pointSol; >>>>> >>>>> Mapping<dim> mapping; >>>>> >>>>> >>>>> >>>>> dealii::Utilities::MPI::RemotePointEvaluation<dim> remotePoint; >>>>> >>>>> remotePoint.reinit(); >>>>> >>>>> pointSol = VectorTools::point_values(mapping, >>>>> dof_handler,locally_relevant_solution,Point<2>(0.2, 0.2),remotePoint); >>>>> >>>>> >>>>> >>>>> Thank you >>>>> >>>>> H >>>>> >>>>> >>>>> >>>>> El mar, 24 ago 2021 a las 14:12, Martin Kronbichler (< >>>>> kronbichl...@gmail.com>) escribió: >>>>> >>>>>> Dear Hermes, >>>>>> >>>>>> Did you try VectorTools::point_values, >>>>>> https://www.dealii.org/current/doxygen/deal.II/namespaceVectorTools.html#a1ad6eceb6cbeaa505baf7f938289bbde >>>>>> ? >>>>>> >>>>>> As an alternative, you can also check if the point is in the locally >>>>>> owned cell of the respective cell, and run the evaluation only on that >>>>>> MPI >>>>>> rank. You can then use an MPI collective, like MPI_Bcast or deal.II's >>>>>> version Utilities::MPI::broadcast, to get the solution to all MPI ranks >>>>>> (typically with another collective to make all ranks agree on who sends >>>>>> the >>>>>> information). >>>>>> >>>>>> Best, >>>>>> Martin >>>>>> >>>>>> This is a variant that allows the evaluation even on remote processes. >>>>>> On 24.08.21 14:05, Hermes Sampedro wrote: >>>>>> >>>>>> Dear all, >>>>>> >>>>>> I am trying to extend my implementation with parallel computing. I >>>>>> would like to get the solution in a single point when having a >>>>>> distributed >>>>>> system. For example, in step-40 I have the >>>>>> *locally_relevant_solution* at the output_result(...) function. >>>>>> In a non distributed implementation I used: >>>>>> >>>>>> Vector<*double*> vecSol (fe.n_components()); >>>>>> >>>>>> VectorTools::point_value(dof_handler, solution,Point<2>(0.2, >>>>>> 0.2),vecSol); >>>>>> >>>>>> >>>>>> What is the easiest way to do that? Is it possible to check if the >>>>>> point is inside the *locally_relevant_solution? *Or would be more >>>>>> appropriate to create a copy of the solution in a global vector and get >>>>>> the >>>>>> point from there? >>>>>> >>>>>> >>>>>> Thank you >>>>>> >>>>>> H >>>>>> >>>>>> El mié, 11 ago 2021 a las 10:12, Hermes Sampedro (< >>>>>> hermes...@gmail.com>) escribió: >>>>>> >>>>>>> Thank you very much, I could make it work. >>>>>>> >>>>>>> Regards, >>>>>>> Hermes >>>>>>> >>>>>>> El mar, 10 ago 2021 a las 19:46, Jean-Paul Pelteret (< >>>>>>> jppel...@gmail.com>) escribió: >>>>>>> >>>>>>>> Another thing: You probably also need to initialise with the right >>>>>>>> number of components. So something like >>>>>>>> Vector<double> vecSol (fe.n_components()); >>>>>>>> >>>>>>>> >>>>>>>> On 10. Aug 2021, at 19:40, Jean-Paul Pelteret <jppel...@gmail.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>> Hi Hermes, >>>>>>>> >>>>>>>> You don’t say what errors you’re seeing, but my guess is that it >>>>>>>> now doesn’t compile. This variant of the function (the one that Daniel >>>>>>>> linked to) returns void, so you should call it before outputting the >>>>>>>> result: >>>>>>>> >>>>>>>> Vector<double> vecSol; >>>>>>>> VectorTools::point_value(dof_handler, >>>>>>>> solution,Point<2>(0.2, 0.2),vecSol) >>>>>>>> std::cout << "Solution at (0.2,0.2): "<< vecSol << std::endl; >>>>>>>> >>>>>>>> This will hopefully get you what you want. >>>>>>>> >>>>>>>> Best, >>>>>>>> Jean-Paul >>>>>>>> >>>>>>>> >>>>>>>> On 10. Aug 2021, at 16:09, Hermes Sampedro <hermes...@gmail.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>> Thank you for your answer. I am not sure if I fully understand your >>>>>>>> suggestion. Do you mean something like that: >>>>>>>> >>>>>>>> Vector<*double*> vecSol; >>>>>>>> std::cout << "Solution at (0.2,0.2): "<< >>>>>>>> VectorTools::point_value(dof_handler, solution,Point<2>(0.2, >>>>>>>> 0.2),vecSol)<< >>>>>>>> std::endl; >>>>>>>> >>>>>>>> >>>>>>>> I still get some errors. Is there not any way to get for example >>>>>>>> the real part of *solution* easily and use it directly on the >>>>>>>> point_value as in step-3? >>>>>>>> >>>>>>>> Thank you >>>>>>>> H >>>>>>>> >>>>>>>> El mar, 10 ago 2021 a las 15:49, Daniel Arndt (<d.arnd...@gmail.com>) >>>>>>>> escribió: >>>>>>>> >>>>>>>>> Hermes, >>>>>>>>> >>>>>>>>> Use another overload. The one returning the solution as a >>>>>>>>> parameter should work: >>>>>>>>> https://www.dealii.org/current/doxygen/deal.II/namespaceVectorTools.html#acd358e9b110ccbf4a7f76796d206b9c7 >>>>>>>>> >>>>>>>>> Best, >>>>>>>>> Daniel >>>>>>>>> >>>>>>>>> Am Di., 10. Aug. 2021 um 09:41 Uhr schrieb Hermes Sampedro < >>>>>>>>> hermes...@gmail.com>: >>>>>>>>> >>>>>>>>>> Dear all, >>>>>>>>>> >>>>>>>>>> It is explained in Step-3 how to evaluate the solution in a >>>>>>>>>> point. I am trying to do the same for Step-29, to evaluate the real >>>>>>>>>> and >>>>>>>>>> imaginary parts separately in a single point: >>>>>>>>>> >>>>>>>>>> *std::cout << "Solution at (0.2,0.2): "<< >>>>>>>>>> VectorTools::point_value(dof_handler, solution,Point<2>(0.2, 0.2))<< >>>>>>>>>> std::endl;* >>>>>>>>>> >>>>>>>>>> I do not have any problems compiling however, an error occurs >>>>>>>>>> when running: >>>>>>>>>> >>>>>>>>>> *The violated condition was: dof.get_fe(0).n_components() == 1* >>>>>>>>>> >>>>>>>>>> What is the proper way to call the real and imaginary parts of >>>>>>>>>> the solution at a particular point here? >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Thank you very much! >>>>>>>>>> >>>>>>>>>> H. >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> The deal.II project is located at http://www.dealii.org/ >>>>>>>>>> For mailing list/forum options, see >>>>>>>>>> https://groups.google.com/d/forum/dealii?hl=en >>>>>>>>>> --- >>>>>>>>>> You received this message because you are subscribed to the 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