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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="MatProductReplaceMats"><H1>MatProductReplaceMats</H1></A>
Replace input matrices for a matrix product.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatProductReplaceMats.html#MatProductReplaceMats">MatProductReplaceMats</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> A,<A HREF="../Mat/Mat.html#Mat">Mat</A> B,<A HREF="../Mat/Mat.html#Mat">Mat</A> C,<A HREF="../Mat/Mat.html#Mat">Mat</A> D)
</PRE>
Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A>
<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>A </B></TD><TD>- the matrix or NULL if not being replaced
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD>- the matrix or NULL if not being replaced
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>C </B></TD><TD>- the matrix or NULL if not being replaced
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>D </B></TD><TD>- the matrix product
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
To reuse the symbolic phase, input matrices must have exactly the same data structure as the replaced one.
If the type of any of the input matrices is different than what previously used, the product is cleared and <A HREF="../Mat/MatProductSetFromOptions.html#MatProductSetFromOptions">MatProductSetFromOptions</A>()/<A HREF="../Mat/MatProductSymbolic.html#MatProductSymbolic">MatProductSymbolic</A>() are invoked again.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatProductCreate.html#MatProductCreate">MatProductCreate</A>(), <A HREF="../Mat/MatProductSetFromOptions.html#MatProductSetFromOptions">MatProductSetFromOptions</A>(), <A HREF="../Mat/MatProductSymbolic.html#MatProductSymbolic">MatProductSymbolic</A>(). <A HREF="../Mat/MatProductClear.html#MatProductClear">MatProductClear</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/matproduct.c.html#MatProductReplaceMats">src/mat/interface/matproduct.c</A>
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