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<A NAME="DMSetMatrixPreallocateOnly"><H1>DMSetMatrixPreallocateOnly</H1></A>
When <A HREF="../DM/DMGetMatrix.html#DMGetMatrix">DMGetMatrix</A>() is called the matrix will be properly preallocated but the nonzero structure and zero values will not be set.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
PetscErrorCode DMSetMatrixPreallocateOnly(DM dm, PetscBool only)
</PRE>
Logically Collective on DMDA
<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>dm </B></TD><TD>- the DM
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>only </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> if only want preallocation
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMGetMatrix.html#DMGetMatrix">DMGetMatrix</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/interface/dm.c.html#DMSetMatrixPreallocateOnly">src/dm/interface/dm.c</A>
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