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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="VecISAXPY"><H1>VecISAXPY</H1></A>
Adds a reduced vector to the appropriate elements of a full-space vector. vfull[is[i]] += alpha*vreduced[i]
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
PetscErrorCode VecISAXPY(Vec vfull, IS is, PetscScalar alpha,Vec vreduced)
</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>vfull </B></TD><TD>- the full-space vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>vreduced </B></TD><TD>- the reduced-space vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>is </B></TD><TD>- the index set for the reduced space
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>vfull </B> -the sum of the full-space vector and reduced-space vector
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecAXPY.html#VecAXPY">VecAXPY</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/vec/utils/projection.c.html#VecISAXPY">src/vec/vec/utils/projection.c</A>
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