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<TITLE>SNESNGMRESSetSelectType</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/manualpages/SNES/SNESNGMRESSetSelectType.html "><small>Report Typos and Errors</small></a></div>
<A NAME="SNESNGMRESSetSelectType"><H1>SNESNGMRESSetSelectType</H1></A>
Sets the selection type for <A HREF="../SNES/SNESNGMRES.html#SNESNGMRES">SNESNGMRES</A>. This determines how the candidate solution and combined solution are used to create the next iterate.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
PetscErrorCode SNESNGMRESSetSelectType(SNES snes,SNESNGMRESSelectType stype)
</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 iterative context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>stype </B></TD><TD>- selection type
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database</FONT></H3>
<DT><B>-snes_ngmres_select_type<difference,none,linesearch></B> -
<br>
<P>
<H3><FONT COLOR="#CC3333">SNESNGMRESSelectTypes</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>SNES_NGMRES_SELECT_NONE </B></TD><TD>- choose the combined solution all the time
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>SNES_NGMRES_SELECT_DIFFERENCE </B></TD><TD>- choose based upon the selection criteria
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>SNES_NGMRES_SELECT_LINESEARCH </B></TD><TD>- choose based upon line search combination
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The default line search used is the L2 line search and it requires two additional function evaluations.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../SNES/SNES.html#SNES">SNES</A>, <A HREF="../SNES/SNESNGMRES.html#SNESNGMRES">SNESNGMRES</A>, selection, type, set <A HREF="../SNES/SNESLineSearch.html#SNESLineSearch">SNESLineSearch</A>
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/snes/impls/ngmres/snesngmres.c.html#SNESNGMRESSetSelectType">src/snes/impls/ngmres/snesngmres.c</A>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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