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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="KSPCreateVecs"><H1>KSPCreateVecs</H1></A>
Gets a number of work vectors.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
PetscErrorCode KSPCreateVecs(KSP ksp,PetscInt rightn, Vec **right,PetscInt leftn,Vec **left)
</PRE>
<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>ksp </B></TD><TD>- iterative context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>rightn </B></TD><TD>- number of right work vectors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>leftn </B></TD><TD>- number of left work vectors to allocate
</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>right </B></TD><TD>- the array of vectors created
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>left </B></TD><TD>- the array of left vectors
</TD></TR></TABLE>
<P>
Note: The right vector has as many elements as the matrix has columns. The left
vector has as many elements as the matrix has rows.
<P>
The vectors are new vectors that are not owned by the <A HREF="../KSP/KSP.html#KSP">KSP</A>, they should be destroyed with calls to <A HREF="../Vec/VecDestroyVecs.html#VecDestroyVecs">VecDestroyVecs</A>() when no longer needed.
<P>
Developers Note: First tries to duplicate the rhs and solution vectors of the <A HREF="../KSP/KSP.html#KSP">KSP</A>, if they do not exist tries to get them from the matrix, if
that does not exist tries to get them from the <A HREF="../DM/DM.html#DM">DM</A> (if it is provided).
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreateVecs.html#MatCreateVecs">MatCreateVecs</A>(), <A HREF="../Vec/VecDestroyVecs.html#VecDestroyVecs">VecDestroyVecs</A>()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/ksp/interface/iterativ.c.html#KSPCreateVecs">src/ksp/ksp/interface/iterativ.c</A>
<BR><A HREF="./index.html">Index of all KSP routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
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