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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="SNESMonitorSet"><H1>SNESMonitorSet</H1></A>
Sets an ADDITIONAL function that is to be used at every iteration of the nonlinear solver to display the iteration's progress.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../SNES/SNESMonitorSet.html#SNESMonitorSet">SNESMonitorSet</A>(<A HREF="../SNES/SNES.html#SNES">SNES</A> snes,<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> (*f)(<A HREF="../SNES/SNES.html#SNES">SNES</A>,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A>,<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A>,void*),void *mctx,<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> (*monitordestroy)(void**))
</PRE>
Logically Collective on <A HREF="../SNES/SNES.html#SNES">SNES</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>snes </B></TD><TD>- the <A HREF="../SNES/SNES.html#SNES">SNES</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- the monitor function, see <A HREF="../SNES/SNESMonitorFunction.html#SNESMonitorFunction">SNESMonitorFunction</A> for the calling sequence
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mctx </B></TD><TD>- [optional] user-defined context for private data for the
monitor routine (use NULL if no context is desired)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>monitordestroy </B></TD><TD>- [optional] routine that frees monitor context
(may be NULL)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-snes_monitor </B></TD><TD>- sets <A HREF="../SNES/SNESMonitorDefault.html#SNESMonitorDefault">SNESMonitorDefault</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-snes_monitor_lg_residualnorm </B></TD><TD>- sets line graph monitor,
uses SNESMonitorLGCreate()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-snes_monitor_cancel </B></TD><TD>- cancels all monitors that have
been hardwired into a code by
calls to <A HREF="../SNES/SNESMonitorSet.html#SNESMonitorSet">SNESMonitorSet</A>(), but
does not cancel those set via
the options database.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Several different monitoring routines may be set by calling
<A HREF="../SNES/SNESMonitorSet.html#SNESMonitorSet">SNESMonitorSet</A>() multiple times; all will be called in the
order in which they were set.
<P>
<H3><FONT COLOR="#CC3333">Fortran Notes</FONT></H3>
Only a single monitor function can be set for each <A HREF="../SNES/SNES.html#SNES">SNES</A> object
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../SNES/SNESMonitorDefault.html#SNESMonitorDefault">SNESMonitorDefault</A>(), <A HREF="../SNES/SNESMonitorCancel.html#SNESMonitorCancel">SNESMonitorCancel</A>(), <A HREF="../SNES/SNESMonitorFunction.html#SNESMonitorFunction">SNESMonitorFunction</A>
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/snes/interface/snes.c.html#SNESMonitorSet">src/snes/interface/snes.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/tutorials/ex2.c.html">src/snes/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex3.c.html">src/snes/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex12.c.html">src/snes/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex21.c.html">src/snes/tutorials/ex21.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex22.c.html">src/snes/tutorials/ex22.c.html</A><BR>
<A HREF="../../../src/ts/tutorials/ex7.c.html">src/ts/tutorials/ex7.c.html</A><BR>
<A HREF="../../../src/ts/tutorials/ex12.c.html">src/ts/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/ts/tutorials/ex52.c.html">src/ts/tutorials/ex52.c.html</A><BR>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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