1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/IS/ISPairToList.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>ISPairToList</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="ISPairToList"><H1>ISPairToList</H1></A>
convert an <A HREF="../IS/IS.html#IS">IS</A> pair encoding an integer map to a list of ISs. Each <A HREF="../IS/IS.html#IS">IS</A> on the output list contains the preimage for each index on the second input <A HREF="../IS/IS.html#IS">IS</A>. The ISs on the output list are constructed on the subcommunicators of the input <A HREF="../IS/IS.html#IS">IS</A> pair. Each subcommunicator corresponds to the preimage of some index j -- this subcomm contains exactly the ranks that assign some indices i to j. This is essentially the inverse of <A HREF="../IS/ISListToPair.html#ISListToPair">ISListToPair</A>().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscis.h"
#undef __FUNCT__
#define __FUNCT__ "ISPairToList"
PetscErrorCode ISPairToList(IS xis, IS yis, PetscInt *listlen, IS **islist)
</PRE>
Collective on indis.
<P>
<H3><FONT COLOR="#CC3333">Input arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>xis </B></TD><TD>- domain <A HREF="../IS/IS.html#IS">IS</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>yis </B></TD><TD>- range <A HREF="../IS/IS.html#IS">IS</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output arguments</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>listlen </B></TD><TD>- length of islist
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>islist </B></TD><TD>- list of ISs breaking up indis by color
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>xis and yis must be of the same length and have congruent communicators.</B></TD><TD>- - The resulting ISs have subcommunicators in a "deadlock-free" order (see <A HREF="../IS/ISListToPair.html#ISListToPair">ISListToPair</A>()).
</TD></TR>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISListToPair.html#ISListToPair">ISListToPair</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/is/is/utils/isdiff.c.html#ISPairToList">src/vec/is/is/utils/isdiff.c</A>
<BR><A HREF="./index.html">Index of all IS routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|