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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="MatXAIJSetPreallocation"><H1>MatXAIJSetPreallocation</H1></A>
set preallocation for serial and parallel AIJ, BAIJ, and SBAIJ matrices
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatXAIJSetPreallocation(Mat A,PetscInt bs,const PetscInt *dnnz,const PetscInt *onnz,const PetscInt *dnnzu,const PetscInt *onnzu)
</PRE>
Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A>
<P>
<H3><FONT COLOR="#CC3333">Input Arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>A </B></TD><TD>- matrix being preallocated
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>bs </B></TD><TD>- block size
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dnnz </B></TD><TD>- number of nonzero blocks per block row of diagonal part of parallel matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>onnz </B></TD><TD>- number of nonzero blocks per block row of off-diagonal part of parallel matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dnnzu </B></TD><TD>- number of nonzero blocks per block row of upper-triangular part of diagonal part of parallel matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>onnzu </B></TD><TD>- number of nonzero blocks per block row of upper-triangular part of off-diagonal part of parallel matrix
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatSeqAIJSetPreallocation.html#MatSeqAIJSetPreallocation">MatSeqAIJSetPreallocation</A>(), <A HREF="../Mat/MatMPIAIJSetPreallocation.html#MatMPIAIJSetPreallocation">MatMPIAIJSetPreallocation</A>(), <A HREF="../Mat/MatSeqBAIJSetPreallocation.html#MatSeqBAIJSetPreallocation">MatSeqBAIJSetPreallocation</A>(), <A HREF="../Mat/MatMPIBAIJSetPreallocation.html#MatMPIBAIJSetPreallocation">MatMPIBAIJSetPreallocation</A>(), <A HREF="../Mat/MatSeqSBAIJSetPreallocation.html#MatSeqSBAIJSetPreallocation">MatSeqSBAIJSetPreallocation</A>(), <A HREF="../Mat/MatMPISBAIJSetPreallocation.html#MatMPISBAIJSetPreallocation">MatMPISBAIJSetPreallocation</A>(),
<BR><A HREF="../Sys/PetscSplitOwnership.html#PetscSplitOwnership">PetscSplitOwnership</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/utils/gcreate.c.html#MatXAIJSetPreallocation">src/mat/utils/gcreate.c</A>
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