<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I don’t see it listed in -help, but I do get<div class=""><br class=""></div><div class=""><div style="margin: 0px; font-size: 18px; font-family: Menlo;" class="">./blowup -xmax 50 -nx 1000 -snes_check_jacobian</div><div style="margin: 0px; font-size: 18px; font-family: Menlo;" class=""> Testing hand-coded Jacobian, if the ratio is O(1.e-8), the hand-coded Jacobian is probably correct.</div><div style="margin: 0px; font-size: 18px; font-family: Menlo;" class=""> Run with -snes_check_jacobian_view [viewer][:filename][:format] to show difference of hand-coded and finite difference Jacobian.</div><div style="margin: 0px; font-size: 18px; font-family: Menlo;" class=""> 63386.1 = ||J - Jfd||//J|| 63386.1 = ||J - Jfd||</div><div class=""><br class=""></div><div class="">
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;">-gideon</span>
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<br class=""><div><blockquote type="cite" class=""><div class="">On Aug 11, 2015, at 2:07 PM, Matthew Knepley <<a href="mailto:knepley@gmail.com" class="">knepley@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">On Tue, Aug 11, 2015 at 1:04 PM, Gideon Simpson <span dir="ltr" class=""><<a href="mailto:gideon.simpson@gmail.com" target="_blank" class="">gideon.simpson@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class="">Macports installation of 3.5.3.</div></blockquote><div class=""><br class=""></div><div class="">Use -help to find the option name. Maybe its -snes_test.</div><div class=""><br class=""></div><div class=""> Thanks,</div><div class=""><br class=""></div><div class=""> Matt</div><div class=""> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""><div class="">
<span style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;" class="">-gideon</span>
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<br class=""><div class=""><blockquote type="cite" class=""><div class="">On Aug 11, 2015, at 2:03 PM, Matthew Knepley <<a href="mailto:knepley@gmail.com" target="_blank" class="">knepley@gmail.com</a>> wrote:</div><br class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">On Tue, Aug 11, 2015 at 12:51 PM, Gideon Simpson <span dir="ltr" class=""><<a href="mailto:gideon.simpson@gmail.com" target="_blank" class="">gideon.simpson@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div style="margin:0px;font-size:18px;font-family:Menlo" class="">#End of PETSc Option Table entries</div><div style="margin:0px;font-size:18px;font-family:Menlo" class="">There is one unused database option. It is:</div><div style="margin:0px;font-size:18px;font-family:Menlo" class="">Option left: name:-snes_check_jacobian_view (no value)</div></div></blockquote><div class=""><br class=""></div><div class="">This is the option for the newest release. What are you using?</div><div class=""><br class=""></div><div class=""> Matt</div><div class=""> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class="">
<span style="border-collapse:separate;border-spacing:0px" class="">-gideon</span>
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<br class=""><div class=""><blockquote type="cite" class=""><div class="">On Aug 11, 2015, at 1:50 PM, Matthew Knepley <<a href="mailto:knepley@gmail.com" target="_blank" class="">knepley@gmail.com</a>> wrote:</div><br class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">On Tue, Aug 11, 2015 at 12:49 PM, Gideon Simpson <span dir="ltr" class=""><<a href="mailto:gideon.simpson@gmail.com" target="_blank" class="">gideon.simpson@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class="">Maybe it’s a quirk of the macports installation of petsc, but nothing seems to be getting generated.</div></blockquote><div class=""><br class=""></div><div class="">Run with -options_left. Is it reading the option?</div><div class=""><br class=""></div><div class=""> Matt</div><div class=""> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""><div class="">
<span style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" class="">-gideon</span>
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<br class=""><div class=""><blockquote type="cite" class=""><div class="">On Aug 11, 2015, at 1:40 PM, Jed Brown <<a href="mailto:jed@jedbrown.org" target="_blank" class="">jed@jedbrown.org</a>> wrote:</div><br class=""><div class="">Gideon Simpson <<a href="mailto:gideon.simpson@gmail.com" target="_blank" class="">gideon.simpson@gmail.com</a>> writes:<br class=""><br class=""><blockquote type="cite" class="">I’m a bit confused by the following options:<br class=""><br class="">Run with -snes_check_jacobian_view [viewer][:filename][:format] to show difference of hand-coded and finite difference Jacobian.<br class=""><br class="">What flags do I pass it to get some output to diagnose my Jacobian error?<br class=""></blockquote><br class="">Nothing to display ASCII to the screen. You might use<br class="">"binary:thematrix" if you want to read it in with Python or MATLAB, for<br class="">example.<br class=""></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""><br clear="all" class=""><span class="HOEnZb"><font color="#888888" class=""><div class=""><br class=""></div>-- <br class=""><div class="">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br class="">-- Norbert Wiener</div>
</font></span></div></div><span class="HOEnZb"><font color="#888888" class="">
</font></span></div></blockquote></div><span class="HOEnZb"><font color="#888888" class=""><br class=""></font></span></div></blockquote></div><span class="HOEnZb"><font color="#888888" class=""><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br class="">-- Norbert Wiener</div>
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</div></blockquote></div><br class=""></div></div></blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="gmail_signature">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br class="">-- Norbert Wiener</div>
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