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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="DMDAGetProcessorSubsets"><H1>DMDAGetProcessorSubsets</H1></A>
Returns communicators consisting only of the processors in a <A HREF="../DM/DMDA.html#DMDA">DMDA</A> adjacent in a particular dimension, corresponding to a logical plane in a 3D grid or a line in a 2D grid.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmda.h"
PetscErrorCode DMDAGetProcessorSubsets(DM da, DMDADirection dir, MPI_Comm *subcomm)
</PRE>
Collective on <A HREF="../DM/DMDA.html#DMDA">DMDA</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
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dir </B></TD><TD>- Cartesian direction, either DMDA_X, DMDA_Y, or DMDA_Z
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>subcomm </B> -new communicator
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
This routine is useful for distributing one-dimensional data in a tensor product grid.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
distributed array, get, processor subset
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/impls/da/dasub.c.html#DMDAGetProcessorSubsets">src/dm/impls/da/dasub.c</A>
<BR><A HREF="./index.html">Index of all DM 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/dm/examples/tutorials/ex51.c.html">src/dm/examples/tutorials/ex51.c.html</A><BR>
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