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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
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<A NAME="SNESMonitorRatio"><H1>SNESMonitorRatio</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 "petsc/private/snesimpl.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../SNES/SNESMonitorRatio.html#SNESMonitorRatio">SNESMonitorRatio</A>(<A HREF="../SNES/SNES.html#SNES">SNES</A> snes,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> its,<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> fgnorm,PetscViewerAndFormat *vf)
</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>- context of monitor
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Insure that <A HREF="../SNES/SNESMonitorRatio.html#SNESMonitorRatio">SNESMonitorRatio</A>() is called when you set this monitor
<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/SNESMonitorSet.html#SNESMonitorSet">SNESMonitorSet</A>(), <A HREF="../SNES/SNESMonitorSolution.html#SNESMonitorSolution">SNESMonitorSolution</A>(), <A HREF="../SNES/SNESMonitorRatio.html#SNESMonitorRatio">SNESMonitorRatio</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/snesut.c.html#SNESMonitorRatio">src/snes/interface/snesut.c</A>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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