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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="MatCreateSubMatrixVirtual"><H1>MatCreateSubMatrixVirtual</H1></A>
Creates a virtual matrix that acts as a submatrix
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatCreateSubMatrixVirtual.html#MatCreateSubMatrixVirtual">MatCreateSubMatrixVirtual</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> A,<A HREF="../IS/IS.html#IS">IS</A> isrow,<A HREF="../IS/IS.html#IS">IS</A> iscol,<A HREF="../Mat/Mat.html#Mat">Mat</A> *newmat)
</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>- matrix that we will extract a submatrix of
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>isrow </B></TD><TD>- rows to be present in the submatrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>iscol </B></TD><TD>- columns to be present in the submatrix
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>newmat </B> -new matrix
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Most will use <A HREF="../Mat/MatCreateSubMatrix.html#MatCreateSubMatrix">MatCreateSubMatrix</A> which provides a more efficient representation if it is available.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreateSubMatrix.html#MatCreateSubMatrix">MatCreateSubMatrix</A>(), <A HREF="../Mat/MatSubMatrixVirtualUpdate.html#MatSubMatrixVirtualUpdate">MatSubMatrixVirtualUpdate</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/impls/submat/submat.c.html#MatCreateSubMatrixVirtual">src/mat/impls/submat/submat.c</A>
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