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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="MatPreallocateSet"><H1>MatPreallocateSet</H1></A>
Indicates the locations (rows and columns) in the matrix where nonzeros will be inserted using a local number of the rows and columns
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include <petscmat.h>
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatPreallocateSet.html#MatPreallocateSet">MatPreallocateSet</A>(<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nrows, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *rows,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> ncols, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *cols,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *dnz, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *onz)
</PRE>
Not Collective
<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>row </B></TD><TD>- the row
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ncols </B></TD><TD>- the number of columns in the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>cols </B></TD><TD>- the columns indicated
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dnz </B></TD><TD>- the array that will be passed to the matrix preallocation routines
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ozn </B></TD><TD>- the other array passed to the matrix preallocation routines
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
See Users-Manual: <A HREF="../../manual.pdf#chapter.14">Chapter 14 Hints for Performance Tuning</A> for more details.
<P>
Do not malloc or free dnz and onz that is handled internally by these routines
<P>
This is a MACRO not a function because it uses variables declared in <A HREF="../Mat/MatPreallocateInitialize.html#MatPreallocateInitialize">MatPreallocateInitialize</A>().
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatPreallocateFinalize.html#MatPreallocateFinalize">MatPreallocateFinalize</A>(), <A HREF="../Mat/MatPreallocateSet.html#MatPreallocateSet">MatPreallocateSet</A>(), <A HREF="../Mat/MatPreallocateSymmetricSetBlock.html#MatPreallocateSymmetricSetBlock">MatPreallocateSymmetricSetBlock</A>(), <A HREF="../Mat/MatPreallocateInitialize.html#MatPreallocateInitialize">MatPreallocateInitialize</A>(),
<BR><A HREF="../Mat/MatPreallocateInitialize.html#MatPreallocateInitialize">MatPreallocateInitialize</A>(), <A HREF="../Mat/MatPreallocateSetLocal.html#MatPreallocateSetLocal">MatPreallocateSetLocal</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/../../include/petscmat.h.html#MatPreallocateSet">src/mat/../../include/petscmat.h</A>
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