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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</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-3.7.5 v3.7.5 docs/manualpages/IS/ISAllGatherColors.html "><small>Report Typos and Errors</small></a></div>
<A NAME="ISAllGatherColors"><H1>ISAllGatherColors</H1></A>
Given a a set of colors on each processor, generates a large set (same on each processor) by concatenating together each processors colors
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscis.h"
PetscErrorCode ISAllGatherColors(MPI_Comm comm,PetscInt n,ISColoringValue *lindices,PetscInt *outN,ISColoringValue *outindices[])
</PRE>
Collective on <A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</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>comm </B></TD><TD>- communicator to share the indices
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- local size of set
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>lindices </B></TD><TD>- local colors
</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>outN </B></TD><TD>- total number of indices
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>outindices </B></TD><TD>- all of the colors
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<A HREF="../IS/ISAllGatherColors.html#ISAllGatherColors">ISAllGatherColors</A>() is clearly not scalable for large index sets.
<P>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISCreateGeneral.html#ISCreateGeneral">ISCreateGeneral</A>(), <A HREF="../IS/ISCreateStride.html#ISCreateStride">ISCreateStride</A>(), <A HREF="../IS/ISCreateBlock.html#ISCreateBlock">ISCreateBlock</A>(), <A HREF="../IS/ISAllGather.html#ISAllGather">ISAllGather</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/is/is/utils/iscoloring.c.html#ISAllGatherColors">src/vec/is/is/utils/iscoloring.c</A>
<BR><A HREF="./index.html">Index of all IS routines</A>
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