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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="MatSeqSBAIJSetPreallocationCSR"><H1>MatSeqSBAIJSetPreallocationCSR</H1></A>
Allocates memory for a sparse sequential matrix in symmetric block AIJ format.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatSeqSBAIJSetPreallocationCSR(Mat B,PetscInt bs,const PetscInt i[],const PetscInt j[], const PetscScalar v[])
</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>B </B></TD><TD>- the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>bs </B></TD><TD>- size of block, the blocks are ALWAYS square.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>i </B></TD><TD>- the indices into j for the start of each local row (starts with zero)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>j </B></TD><TD>- the column indices for each local row (starts with zero) these must be sorted for each row
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>v </B></TD><TD>- optional values in the matrix
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The order of the entries in values is specified by the <A HREF="../Mat/MatOption.html#MatOption">MatOption</A> MAT_ROW_ORIENTED. For example, C programs
may want to use the default MAT_ROW_ORIENTED=<A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> and use an array v[nnz][bs][bs] where the second index is
over rows within a block and the last index is over columns within a block row. Fortran programs will likely set
MAT_ROW_ORIENTED=<A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A> and use a Fortran array v(bs,bs,nnz) in which the first index is over rows within a
block column and the second index is over columns within a block.
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
matrix, block, aij, compressed row, sparse
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreate.html#MatCreate">MatCreate</A>(), <A HREF="../Mat/MatCreateSeqSBAIJ.html#MatCreateSeqSBAIJ">MatCreateSeqSBAIJ</A>(), <A HREF="../Mat/MatSetValuesBlocked.html#MatSetValuesBlocked">MatSetValuesBlocked</A>(), <A HREF="../Mat/MatSeqSBAIJSetPreallocation.html#MatSeqSBAIJSetPreallocation">MatSeqSBAIJSetPreallocation</A>(), <A HREF="../Mat/MATSEQSBAIJ.html#MATSEQSBAIJ">MATSEQSBAIJ</A>
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/impls/sbaij/seq/sbaij.c.html#MatSeqSBAIJSetPreallocationCSR">src/mat/impls/sbaij/seq/sbaij.c</A>
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