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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="MatCreateSeqAIJSELL"><H1>MatCreateSeqAIJSELL</H1></A>
Creates a sparse matrix of type SEQAIJSELL. This type inherits from AIJ and is largely identical, but keeps a "shadow" copy of the matrix in SEQSELL format, which is used when this format may be more suitable for a requested operation. Currently, SEQSELL format is used for <A HREF="../Mat/MatMult.html#MatMult">MatMult</A>, <A HREF="../Mat/MatMultTranspose.html#MatMultTranspose">MatMultTranspose</A>, <A HREF="../Mat/MatMultAdd.html#MatMultAdd">MatMultAdd</A>, <A HREF="../Mat/MatMultTransposeAdd.html#MatMultTransposeAdd">MatMultTransposeAdd</A>, and <A HREF="../Mat/MatSOR.html#MatSOR">MatSOR</A> operations. Because SEQAIJSELL is a subtype of SEQAIJ, the option "-mat_seqaij_type seqaijsell" can be used to make sequential AIJ matrices default to being instances of MATSEQAIJSELL.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatCreateSeqAIJSELL.html#MatCreateSeqAIJSELL">MatCreateSeqAIJSELL</A>(<A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</A> comm,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> m,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> n,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nz,const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nnz[],<A HREF="../Mat/Mat.html#Mat">Mat</A> *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>comm </B></TD><TD>- MPI communicator, set to <A HREF="../Sys/PETSC_COMM_SELF.html#PETSC_COMM_SELF">PETSC_COMM_SELF</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>m </B></TD><TD>- number of rows
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- number of columns
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nz </B></TD><TD>- number of nonzeros per row (same for all rows)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nnz </B></TD><TD>- array containing the number of nonzeros in the various rows
(possibly different for each row) or NULL
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>A </B> -the matrix
<br>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<DT><B>-mat_aijsell_eager_shadow </B> -Construct shadow matrix upon matrix assembly; default is to take a "lazy" approach, performing this step the first time the matrix is applied
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
If nnz is given then nz is ignored
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
matrix, sparse
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreate.html#MatCreate">MatCreate</A>(), <A HREF="../Mat/MatCreateMPIAIJSELL.html#MatCreateMPIAIJSELL">MatCreateMPIAIJSELL</A>(), <A HREF="../Mat/MatSetValues.html#MatSetValues">MatSetValues</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/impls/aij/seq/aijsell/aijsell.c.html#MatCreateSeqAIJSELL">src/mat/impls/aij/seq/aijsell/aijsell.c</A>
<BR><A HREF="./index.html">Index of all Mat routines</A>
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