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<A NAME="DMCompositeGetColoring"><H1>DMCompositeGetColoring</H1></A>
Gets the coloring required for computing the Jacobian via finite differences on a function defined using a <A HREF="../DA/DMComposite.html#DMComposite">DMComposite</A> "grid"
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscda.h"
PetscErrorCode PETSCDM_DLLEXPORT DMCompositeGetColoring(DMComposite dmcomposite,ISColoringType ctype,ISColoring *coloring)
</PRE>
Collective on <A HREF="../DA/DA.html#DA">DA</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dmcomposite </B></TD><TD>- the <A HREF="../DA/DMComposite.html#DMComposite">DMComposite</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctype </B></TD><TD>- IS_COLORING_GLOBAL or IS_COLORING_GHOSTED
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>coloring </B> -matrix coloring for use in computing Jacobians (or <A HREF="../Sys/PETSC_NULL.html#PETSC_NULL">PETSC_NULL</A> if not needed)
<br>
<P>
<P>
Notes: This currentlu uses one color per column so is very slow.
<P>
Notes: These compute the graph coloring of the graph of A^{T}A. The coloring used
for efficient (parallel or thread based) triangular solves etc is NOT yet
available.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISColoringView.html#ISColoringView">ISColoringView</A>(), <A HREF="../IS/ISColoringGetIS.html#ISColoringGetIS">ISColoringGetIS</A>(), <A HREF="../MatFD/MatFDColoringCreate.html#MatFDColoringCreate">MatFDColoringCreate</A>(), <A HREF="../IS/ISColoringType.html#ISColoringType">ISColoringType</A>, <A HREF="../IS/ISColoring.html#ISColoring">ISColoring</A>, <A HREF="../DA/DAGetColoring.html#DAGetColoring">DAGetColoring</A>()
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<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/da/utils/pack.c.html#DMCompositeGetColoring">src/dm/da/utils/pack.c</A>
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