[petsc-users] checking jacobian

[Jed Brown]

Gideon Simpson <gideon.simpson at gmail.com> 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.
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