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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>SLESSetOptionsPrefix</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<A NAME="SLESSetOptionsPrefix"><H1>SLESSetOptionsPrefix</H1></A>
Sets the prefix used for searching for all <A HREF="../SLES/SLES.html#SLES">SLES</A> options in the database.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsles.h"
int SLESSetOptionsPrefix(SLES sles,char *prefix)
</PRE>
Collective on <A HREF="../SLES/SLES.html#SLES">SLES</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>sles </B></TD><TD>- the <A HREF="../SLES/SLES.html#SLES">SLES</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>prefix </B></TD><TD>- the prefix to prepend to all option names
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
A hyphen (-) must NOT be given at the beginning of the prefix name.
The first character of all runtime options is AUTOMATICALLY the
hyphen.
<P>
This prefix is particularly useful for nested use of <A HREF="../SLES/SLES.html#SLES">SLES</A>. For
example, the block Jacobi and block diagonal preconditioners use
the prefix "sub_" for options relating to the individual blocks.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../SLES/SLES.html#SLES">SLES</A>, set, options, prefix, database
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../SLES/SLESAppendOptionsPrefix.html#SLESAppendOptionsPrefix">SLESAppendOptionsPrefix</A>(), <A HREF="../SLES/SLESGetOptionsPrefix.html#SLESGetOptionsPrefix">SLESGetOptionsPrefix</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sles/interface/sles.c.html#SLESSetOptionsPrefix">src/sles/interface/sles.c</A>
<BR><A HREF="./index.html">Index of all SLES routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/examples/tutorials/ex24.c.html">src/snes/examples/tutorials/ex24.c.html</A><BR>
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