Assuming you've already assembled K, so you can just do a matvec (SparseMatrix::vector_mult) followed by a dot product (NumericVector::dot).
David On Tue, Jan 19, 2016 at 4:53 PM, Junchao Zhang <junchao.zh...@gmail.com> wrote: > Hello, > I want to compute e^TKe as a measure of the error of a solution. Here e = > U - Uex, supposing I know the analytic answer to the PDE. > How can I do it in libmesh? Is there an example? > Thank you. > > --Junchao Zhang > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > _______________________________________________ > Libmesh-users mailing list > Libmesh-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
