Or you can specify this directly in your code. See http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-current/docs/manualpages/KSP/KSPSetInitialGuessNonzero.html
Cheers, Dave On 5 November 2010 07:11, Aron Ahmadia <aron.ahmadia at kaust.edu.sa> wrote: > Hi Jinshan, > > You can pass your initial guess in to the KSP object as X, then at the > command line set the flag: > > -ksp_initial_guess_nonzero > > Happy Computing, > Aron > > On Fri, Nov 5, 2010 at 8:41 AM, jinshan wu <wujinshan at yahoo.com> wrote: >> Hi all, >> >> I am using the GMRES linear solver in PETSC. I have a very good initial >> guess of >> the true solution. Can I somehow supply it to the solver? It should help the >> solver speed up the convergence if I can do that. Thanks. >> >> Jinshan >> >> >> >> >
