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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="MatCompositeMerge"><H1>MatCompositeMerge</H1></A>
Given a composite matrix, replaces it with a "regular" matrix by summing or computing the product of all the matrices inside the composite matrix.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatCompositeMerge.html#MatCompositeMerge">MatCompositeMerge</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> mat)
</PRE>
Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mat </B></TD><TD>- the composite matrix
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-mat_composite_merge </B></TD><TD>- merge in <A HREF="../Mat/MatAssemblyEnd.html#MatAssemblyEnd">MatAssemblyEnd</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-mat_composite_merge_type </B></TD><TD>- set merge direction
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The <A HREF="../Mat/MatType.html#MatType">MatType</A> of the resulting matrix will be the same as the <A HREF="../Mat/MatType.html#MatType">MatType</A> of the FIRST
matrix in the composite matrix.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatDestroy.html#MatDestroy">MatDestroy</A>(), <A HREF="../Mat/MatMult.html#MatMult">MatMult</A>(), <A HREF="../Mat/MatCompositeAddMat.html#MatCompositeAddMat">MatCompositeAddMat</A>(), <A HREF="../Mat/MatCreateComposite.html#MatCreateComposite">MatCreateComposite</A>(), <A HREF="../Mat/MatCompositeSetMatStructure.html#MatCompositeSetMatStructure">MatCompositeSetMatStructure</A>(), <A HREF="../Mat/MatCompositeSetMergeType.html#MatCompositeSetMergeType">MatCompositeSetMergeType</A>(), <A HREF="../Mat/MATCOMPOSITE.html#MATCOMPOSITE">MATCOMPOSITE</A>
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/impls/composite/mcomposite.c.html#MatCompositeMerge">src/mat/impls/composite/mcomposite.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/mat/tutorials/ex9.c.html">src/mat/tutorials/ex9.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/mat/impls/composite/mcomposite.c.html#MatCompositeMerge_Composite">MatCompositeMerge_Composite in src/mat/impls/composite/mcomposite.c</A><BR>
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