Dear Dealii community, I am using Arpack Solver to compute eigenvalues of my stiffness matrix. To speed up the process, I would only like the eigenvalues to be computed and not the eigenvectors. There is a flag in arpack.h "rvec" (Link - https://www.dealii.org/current/doxygen/deal.II/arpack__solver_8h_source.html#l00796) which essentially takes care of that.
However, I have no way of passing it as a parameter to the solver <https://www.dealii.org/current/doxygen/deal.II/classArpackSolver.html#afdc3aa9d761c43b5b4132e731c6191a5> function. I was planning to edit the header file *arpack.h* <https://www.dealii.org/current/doxygen/deal.II/arpack__solver_8h_source.html> accordingly which is inside the */usr/local/include/deal.II/lac* to have that functionality. I was actually thinking of passing the flag "rvec" as an argument to the function solve <https://www.dealii.org/current/doxygen/deal.II/classArpackSolver.html#afdc3aa9d761c43b5b4132e731c6191a5>. I was wondering if I change the permission of the file to write mode, edit it and save it, would I be able to run my code inside the examples folder. Or do I need to take care of something else while and after editing that headerfile? Also, I guess it would be a good idea to change the arpack.h in the next release of dealii so that it can have that functionality. This might help many other users. Thanks! Animesh -- 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 Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/0b155588-b28a-472a-a452-5cb3bdc37682n%40googlegroups.com.
