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<A NAME="MatGetBlockSize"><H1>MatGetBlockSize</H1></A>
Returns the matrix block <A HREF="../Sys/size.html#size">size</A>; useful especially for the block row and block diagonal formats.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatGetBlockSize(Mat mat,PetscInt *bs)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>mat </B> -the matrix
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<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>bs </B> -block <A HREF="../Sys/size.html#size">size</A>
<br>
<P>
<H3><FONT COLOR="#CC3333">C++ variants</FONT></H3><TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD> PetscInt MatGetBlockSize(Mat mat)<TD WIDTH=20></TD><TD>-></TD><TD WIDTH=20></TD><TD>MatGetBlockSize(mat,&a); return a;</TR></TD>
</TABLE>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Block diagonal formats are <A HREF="../Mat/MATSEQBDIAG.html#MATSEQBDIAG">MATSEQBDIAG</A>, <A HREF="../Mat/MATMPIBDIAG.html#MATMPIBDIAG">MATMPIBDIAG</A>.
Block row formats are <A HREF="../Mat/MATSEQBAIJ.html#MATSEQBAIJ">MATSEQBAIJ</A>, <A HREF="../Mat/MATMPIBAIJ.html#MATMPIBAIJ">MATMPIBAIJ</A>, <A HREF="../Mat/MATSEQSBAIJ.html#MATSEQSBAIJ">MATSEQSBAIJ</A>, <A HREF="../Mat/MATMPISBAIJ.html#MATMPISBAIJ">MATMPISBAIJ</A>
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<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreateSeqBAIJ.html#MatCreateSeqBAIJ">MatCreateSeqBAIJ</A>(), <A HREF="../Mat/MatCreateMPIBAIJ.html#MatCreateMPIBAIJ">MatCreateMPIBAIJ</A>(), <A HREF="../Mat/MatCreateSeqBDiag.html#MatCreateSeqBDiag">MatCreateSeqBDiag</A>(), <A HREF="../Mat/MatCreateMPIBDiag.html#MatCreateMPIBDiag">MatCreateMPIBDiag</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/interface/matrix.c.html#MatGetBlockSize">src/mat/interface/matrix.c</A>
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