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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
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<A NAME="MatGetBlockSizes"><H1>MatGetBlockSizes</H1></A>
Returns the matrix block row and column sizes.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatGetBlockSizes.html#MatGetBlockSizes">MatGetBlockSizes</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> mat,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *rbs, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *cbs)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>mat </B> -the matrix
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>rbs </B> -row block size
<br>
<DT><B>cbs </B> -column block size
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
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>. These formats ALWAYS have square block storage in the matrix.
If you pass a different block size for the columns than the rows, the row block size determines the square block storage.
<P>
If a block size has not been set yet this routine returns 1.
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreateSeqBAIJ.html#MatCreateSeqBAIJ">MatCreateSeqBAIJ</A>(), <A HREF="../Mat/MatCreateBAIJ.html#MatCreateBAIJ">MatCreateBAIJ</A>(), <A HREF="../Mat/MatGetBlockSize.html#MatGetBlockSize">MatGetBlockSize</A>(), <A HREF="../Mat/MatSetBlockSize.html#MatSetBlockSize">MatSetBlockSize</A>(), <A HREF="../Mat/MatSetBlockSizes.html#MatSetBlockSizes">MatSetBlockSizes</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/interface/matrix.c.html#MatGetBlockSizes">src/mat/interface/matrix.c</A>
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