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<TITLE>VecScatterView</TITLE>
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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/Vec/VecScatterView.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecScatterView"><H1>VecScatterView</H1></A>
Views a vector scatter context.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
PetscErrorCode VecScatterView(VecScatter ctx,PetscViewer viewer)
</PRE>
Collective on <A HREF="../Vec/VecScatter.html#VecScatter">VecScatter</A>
<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>ctx </B></TD><TD>- the scatter context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>viewer </B></TD><TD>- the viewer for displaying the context
</TD></TR></TABLE>
<P>
<P>
C@*/
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecScatterView.html#VecScatterView">VecScatterView</A>(<A HREF="../Vec/VecScatter.html#VecScatter">VecScatter</A> ctx,<A HREF="../Viewer/PetscViewer.html#PetscViewer">PetscViewer</A> viewer)
{
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> ierr;
<P>
<A HREF="../Sys/PetscFunctionBegin.html#PetscFunctionBegin">PetscFunctionBegin</A>;
PetscValidHeaderSpecific(ctx,VEC_SCATTER_CLASSID,1);
if (!viewer) {
ierr = <A HREF="../Viewer/PetscViewerASCIIGetStdout.html#PetscViewerASCIIGetStdout">PetscViewerASCIIGetStdout</A>(<A HREF="../Sys/PetscObjectComm.html#PetscObjectComm">PetscObjectComm</A>((<A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>)ctx),&viewer);<A HREF="../Sys/CHKERRQ.html#CHKERRQ">CHKERRQ</A>(ierr);
}
PetscValidHeaderSpecific(viewer,PETSC_VIEWER_CLASSID,2);
if (ctx->ops->view) {
ierr = (*ctx->ops->view)(ctx,viewer);<A HREF="../Sys/CHKERRQ.html#CHKERRQ">CHKERRQ</A>(ierr);
}
<A HREF="../Sys/PetscFunctionReturn.html#PetscFunctionReturn">PetscFunctionReturn</A>(0);
}
<P>
#undef __FUNCT__
#define __FUNCT__ "VecScatterRemap"
/*@C
VecScatterRemap - Remaps the "from" and "to" indices in a
vector scatter context. FOR EXPERTS ONLY!
<P>
Collective on <A HREF="../Vec/VecScatter.html#VecScatter">VecScatter</A>
<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>scat </B></TD><TD>- vector scatter context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>from </B></TD><TD>- remapping for "from" indices (may be NULL)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>to </B></TD><TD>- remapping for "to" indices (may be NULL)
</TD></TR></TABLE>
<P>
<P>
Notes: In the parallel case the todata is actually the indices
from which the data is TAKEN! The from stuff is where the
data is finally put. This is VERY VERY confusing!
<P>
In the sequential case the todata is the indices where the
data is put and the fromdata is where it is taken from.
This is backwards from the paralllel case! CRY! CRY! CRY!
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/vec/utils/vscat.c.html#VecScatterView">src/vec/vec/utils/vscat.c</A>
<BR><A HREF="./index.html">Index of all Vec 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>
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