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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.14.5 v3.14.5 docs/manualpages/IS/ISColoringCreate.html "><small>Report Typos and Errors</small></a></div>
<A NAME="ISColoringCreate"><H1>ISColoringCreate</H1></A>
Generates an <A HREF="../IS/ISColoring.html#ISColoring">ISColoring</A> context from lists (provided by each processor) of colors for each node.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscis.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../IS/ISColoringCreate.html#ISColoringCreate">ISColoringCreate</A>(<A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</A> comm,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> ncolors,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> n,const ISColoringValue colors[],<A HREF="../Sys/PetscCopyMode.html#PetscCopyMode">PetscCopyMode</A> mode,<A HREF="../IS/ISColoring.html#ISColoring">ISColoring</A> *iscoloring)
</PRE>
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>comm </B></TD><TD>- communicator for the processors creating the coloring
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ncolors </B></TD><TD>- max color value
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- number of nodes on this processor
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>colors </B></TD><TD>- array containing the colors for this processor, color numbers begin at 0.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mode </B></TD><TD>- see <A HREF="../Sys/PetscCopyMode.html#PetscCopyMode">PetscCopyMode</A> for meaning of this flag.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>iscoloring </B></TD><TD>- the resulting coloring data structure
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-is_coloring_view </B></TD><TD>- Activates <A HREF="../IS/ISColoringView.html#ISColoringView">ISColoringView</A>()
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
By default sets coloring type to <A HREF="../IS/ISColoringType.html#ISColoringType">IS_COLORING_GLOBAL</A>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../MatOrderings/MatColoringCreate.html#MatColoringCreate">MatColoringCreate</A>(), <A HREF="../IS/ISColoringView.html#ISColoringView">ISColoringView</A>(), <A HREF="../IS/ISColoringDestroy.html#ISColoringDestroy">ISColoringDestroy</A>(), <A HREF="../IS/ISColoringSetType.html#ISColoringSetType">ISColoringSetType</A>()
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/vec/is/is/utils/iscoloring.c.html#ISColoringCreate">src/vec/is/is/utils/iscoloring.c</A>
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