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<A NAME="SNESRatioMonitor"><H1>SNESRatioMonitor</H1></A>
Monitors progress of the <A HREF="../SNES/SNES.html#SNES">SNES</A> solvers by printing the ratio of residual norm at each iteration to the previous.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
int SNESRatioMonitor(SNES snes,int its,PetscReal fgnorm,void *dummy)
</PRE>
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>its </B></TD><TD>- iteration number
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fgnorm </B></TD><TD>- 2-norm of residual (or gradient)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dummy </B></TD><TD>- unused context
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../SNES/SNES.html#SNES">SNES</A>, nonlinear, monitor, norm
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../SNES/SNESSetMonitor.html#SNESSetMonitor">SNESSetMonitor</A>(), <A HREF="../SNES/SNESVecViewMonitor.html#SNESVecViewMonitor">SNESVecViewMonitor</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/snes/interface/snesut.c.html#SNESRatioMonitor">src/snes/interface/snesut.c</A>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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