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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="DMDALocalToLocalBegin"><H1>DMDALocalToLocalBegin</H1></A>
Maps from a local vector (including ghost points that contain irrelevant values) to another local vector where the ghost points in the second are set correctly. Must be followed by <A HREF="../DM/DMDALocalToLocalEnd.html#DMDALocalToLocalEnd">DMDALocalToLocalEnd</A>().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmda.h"
PetscErrorCode DMDALocalToLocalBegin(DM da,Vec g,InsertMode mode,Vec l)
</PRE>
Neighbor-wise Collective on <A HREF="../DM/DMDA.html#DMDA">DMDA</A> and <A HREF="../Vec/Vec.html#Vec">Vec</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>da </B></TD><TD>- the distributed array context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>g </B></TD><TD>- the original local vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mode </B></TD><TD>- one of <A HREF="../Sys/INSERT_VALUES.html#INSERT_VALUES">INSERT_VALUES</A> or <A HREF="../Sys/ADD_VALUES.html#ADD_VALUES">ADD_VALUES</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>l </B> -the local vector with correct ghost values
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The local vectors used here need not be the same as those
obtained from <A HREF="../DM/DMCreateLocalVector.html#DMCreateLocalVector">DMCreateLocalVector</A>(), BUT they
must have the same parallel data layout; they could, for example, be
obtained with <A HREF="../Vec/VecDuplicate.html#VecDuplicate">VecDuplicate</A>() from the <A HREF="../DM/DMDA.html#DMDA">DMDA</A> originating vectors.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
distributed array, local-to-local, begin
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMDALocalToLocalEnd.html#DMDALocalToLocalEnd">DMDALocalToLocalEnd</A>(), <A HREF="../DM/DMLocalToGlobalBegin.html#DMLocalToGlobalBegin">DMLocalToGlobalBegin</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/impls/da/daltol.c.html#DMDALocalToLocalBegin">src/dm/impls/da/daltol.c</A>
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