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<div id="version" align=right><b>slepc-3.7.3 2016-09-29</b></div>
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<H1>MFNMonitorSet</H1>
Sets an ADDITIONAL function to be called at every iteration to monitor convergence.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcmfn.h"
PetscErrorCode MFNMonitorSet(MFN mfn,PetscErrorCode (*monitor)(MFN,PetscInt,PetscReal,void*),void *mctx,PetscErrorCode (*monitordestroy)(void**))
</PRE>
Logically Collective on <A HREF="../MFN/MFN.html#MFN">MFN</A>
<P>
<H3><FONT COLOR="#883300">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mfn </B></TD><TD> - matrix function context obtained from <A HREF="../MFN/MFNCreate.html#MFNCreate">MFNCreate</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>monitor </B></TD><TD> - pointer to function (if this is NULL, it turns off monitoring)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mctx </B></TD><TD> - [optional] 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="#883300">Calling Sequence of monitor</FONT></H3>
<pre>
monitor(<A HREF="../MFN/MFN.html#MFN">MFN</A> mfn,int its,PetscReal errest,void *mctx)
</pre>
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mfn </B></TD><TD> - matrix function context obtained from <A HREF="../MFN/MFNCreate.html#MFNCreate">MFNCreate</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>its </B></TD><TD> - iteration number
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>errest </B></TD><TD> - error estimate
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mctx </B></TD><TD> - optional monitoring context, as set by <A HREF="../MFN/MFNMonitorSet.html#MFNMonitorSet">MFNMonitorSet</A>()
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-mfn_monitor </B></TD><TD> - print the error estimate
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-mfn_monitor_lg </B></TD><TD> - sets line graph monitor for the error estimate
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-mfn_monitor_cancel </B></TD><TD> - cancels all monitors that have been hardwired into
a code by calls to <A HREF="../MFN/MFNMonitorSet.html#MFNMonitorSet">MFNMonitorSet</A>(), but does not cancel those set via
the options database.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Notes</FONT></H3>
Several different monitoring routines may be set by calling
<A HREF="../MFN/MFNMonitorSet.html#MFNMonitorSet">MFNMonitorSet</A>() multiple times; all will be called in the
order in which they were set.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
MFNMonitorFirst(), MFNMonitorAll(), <A HREF="../MFN/MFNMonitorCancel.html#MFNMonitorCancel">MFNMonitorCancel</A>()
<BR><P><B><FONT COLOR="#883300">Location: </FONT></B><A HREF="../../../src/mfn/interface/mfnmon.c.html#MFNMonitorSet">src/mfn/interface/mfnmon.c</A>
<BR><A HREF="./index.html">Index of all MFN routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
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