On Tue, Aug 11, 2015 at 12:51 PM, Gideon Simpson <[email protected]> wrote:
> #End of PETSc Option Table entries > There is one unused database option. It is: > Option left: name:-snes_check_jacobian_view (no value) > This is the option for the newest release. What are you using? Matt > -gideon > > On Aug 11, 2015, at 1:50 PM, Matthew Knepley <[email protected]> wrote: > > On Tue, Aug 11, 2015 at 12:49 PM, Gideon Simpson <[email protected] > > wrote: > >> Maybe it’s a quirk of the macports installation of petsc, but nothing >> seems to be getting generated. >> > > Run with -options_left. Is it reading the option? > > Matt > > >> -gideon >> >> On Aug 11, 2015, at 1:40 PM, Jed Brown <[email protected]> wrote: >> >> Gideon Simpson <[email protected]> writes: >> >> I’m a bit confused by the following options: >> >> Run with -snes_check_jacobian_view [viewer][:filename][:format] to show >> difference of hand-coded and finite difference Jacobian. >> >> What flags do I pass it to get some output to diagnose my Jacobian error? >> >> >> Nothing to display ASCII to the screen. You might use >> "binary:thematrix" if you want to read it in with Python or MATLAB, for >> example. >> >> >> > > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener
