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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/DM/DMGetGlobalVector.html "><small>Report Typos and Errors</small></a></div>
<A NAME="DMGetGlobalVector"><H1>DMGetGlobalVector</H1></A>
Gets a MPI PETSc vector that may be used with the DMXXX routines.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
PetscErrorCode DMGetGlobalVector(DM dm,Vec *g)
</PRE>
Collective on <A HREF="../DM/DM.html#DM">DM</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>dm </B> -the distributed array
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>g </B> -the global vector
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
The vector values are NOT initialized and may have garbage in them, so you may need
to zero them.
<P>
The output parameter, g, is a regular PETSc vector that should be returned with
<A HREF="../DM/DMRestoreGlobalVector.html#DMRestoreGlobalVector">DMRestoreGlobalVector</A>() DO NOT call <A HREF="../Vec/VecDestroy.html#VecDestroy">VecDestroy</A>() on it.
<P>
This is intended to be used for vectors you need for a short time, like within a single function call.
For vectors that you intend to keep around (for example in a C struct) or pass around large parts of your
code you should use <A HREF="../DM/DMCreateGlobalVector.html#DMCreateGlobalVector">DMCreateGlobalVector</A>().
<P>
VecStride*() operations can be useful when using <A HREF="../DM/DM.html#DM">DM</A> with dof > 1
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
distributed array, create, Global, vector
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMCreateGlobalVector.html#DMCreateGlobalVector">DMCreateGlobalVector</A>(), <A HREF="../Vec/VecDuplicate.html#VecDuplicate">VecDuplicate</A>(), <A HREF="../Vec/VecDuplicateVecs.html#VecDuplicateVecs">VecDuplicateVecs</A>(),
<BR><A HREF="../DM/DMDACreate1d.html#DMDACreate1d">DMDACreate1d</A>(), <A HREF="../DM/DMDACreate2d.html#DMDACreate2d">DMDACreate2d</A>(), <A HREF="../DM/DMDACreate3d.html#DMDACreate3d">DMDACreate3d</A>(), <A HREF="../DM/DMGlobalToLocalBegin.html#DMGlobalToLocalBegin">DMGlobalToLocalBegin</A>(),
<A HREF="../DM/DMGlobalToLocalEnd.html#DMGlobalToLocalEnd">DMGlobalToLocalEnd</A>(), <A HREF="../DM/DMLocalToGlobalBegin.html#DMLocalToGlobalBegin">DMLocalToGlobalBegin</A>(), <A HREF="../DM/DMCreateLocalVector.html#DMCreateLocalVector">DMCreateLocalVector</A>(), <A HREF="../DM/DMRestoreLocalVector.html#DMRestoreLocalVector">DMRestoreLocalVector</A>()
<A HREF="../Vec/VecStrideMax.html#VecStrideMax">VecStrideMax</A>(), <A HREF="../Vec/VecStrideMin.html#VecStrideMin">VecStrideMin</A>(), <A HREF="../Vec/VecStrideNorm.html#VecStrideNorm">VecStrideNorm</A>()
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/interface/dmget.c.html#DMGetGlobalVector">src/dm/interface/dmget.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/impls/plex/examples/tutorials/ex1.c.html">src/dm/impls/plex/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/dm/impls/plex/examples/tutorials/ex1f90.F.html">src/dm/impls/plex/examples/tutorials/ex1f90.F.html</A><BR>
<A HREF="../../../src/dm/examples/tutorials/ex12.c.html">src/dm/examples/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/dm/examples/tutorials/ex51.c.html">src/dm/examples/tutorials/ex51.c.html</A><BR>
<A HREF="../../../src/dm/examples/tutorials/ex11f90.F.html">src/dm/examples/tutorials/ex11f90.F.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex31.c.html">src/ksp/ksp/examples/tutorials/ex31.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex12.c.html">src/snes/examples/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex22.c.html">src/snes/examples/tutorials/ex22.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex33.c.html">src/snes/examples/tutorials/ex33.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex62.c.html">src/snes/examples/tutorials/ex62.c.html</A><BR>
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