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<TITLE>MatCreateMPIDense</TITLE>
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<A NAME="MatCreateMPIDense"><H1>MatCreateMPIDense</H1></A>
Creates a sparse parallel matrix in dense format.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
int MatCreateMPIDense(MPI_Comm comm,int m,int n,int M,int N,PetscScalar *data,Mat *A)
</PRE>
Collective on <A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</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 HREF="../Sys/comm.html#comm">comm</A> </B></TD><TD>- MPI communicator
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>m </B></TD><TD>- number of local rows (or <A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A> to have calculated if M is given)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- number of local columns (or <A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A> to have calculated if N is given)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>M </B></TD><TD>- number of global rows (or <A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A> to have calculated if m is given)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>N </B></TD><TD>- number of global columns (or <A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A> to have calculated if n is given)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>data </B></TD><TD>- optional location of matrix data. Set data=<A HREF="../Sys/PETSC_NULL.html#PETSC_NULL">PETSC_NULL</A> (PETSC_NULL_SCALAR for Fortran users) for PETSc
to control all matrix memory allocation.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>A </B> -the matrix
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The dense format is fully compatible with standard Fortran 77
storage by columns.
<P>
The data input variable is intended primarily for Fortran programmers
who wish to allocate their own matrix memory space. Most users should
set data=<A HREF="../Sys/PETSC_NULL.html#PETSC_NULL">PETSC_NULL</A> (PETSC_NULL_SCALAR for Fortran users).
<P>
The user MUST specify either the local or global matrix dimensions
(possibly both).
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
matrix,dense, parallel
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreate.html#MatCreate">MatCreate</A>(), <A HREF="../Mat/MatCreateSeqDense.html#MatCreateSeqDense">MatCreateSeqDense</A>(), <A HREF="../Mat/MatSetValues.html#MatSetValues">MatSetValues</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/impls/dense/mpi/mpidense.c.html#MatCreateMPIDense">src/mat/impls/dense/mpi/mpidense.c</A>
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