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<A NAME="MatCreateIS"><H1>MatCreateIS</H1></A>
Creates a "process" unassmembled matrix, it is assembled on each process but not across processes.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode PETSCMAT_DLLEXPORT MatCreateIS(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt M,PetscInt N,ISLocalToGlobalMapping map,Mat *A)
</PRE>
<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 HREF="../Sys/comm.html#comm">comm</A> </B></TD><TD>- MPI communicator that will share the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>m,n,M,N </B></TD><TD>- local and/or global sizes of the the left and right vector used in matrix vector products
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>map </B></TD><TD>- mapping that defines the global number for each local number
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>A </B> -the resulting matrix
<br>
<P>
<P>
Notes: See <A HREF="../Mat/MATIS.html#MATIS">MATIS</A> for more details
m and n are NOT related to the <A HREF="../Sys/size.html#size">size</A> of the map
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MATIS.html#MATIS">MATIS</A>, <A HREF="../Mat/MatSetLocalToGlobalMapping.html#MatSetLocalToGlobalMapping">MatSetLocalToGlobalMapping</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/impls/is/matis.c.html#MatCreateIS">src/mat/impls/is/matis.c</A>
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