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<TITLE>VecScale</TITLE>
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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</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-3.10.3 v3.10.3 docs/manualpages/Vec/VecScale.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecScale"><H1>VecScale</H1></A>
Scales a vector.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecScale.html#VecScale">VecScale</A>(<A HREF="../Vec/Vec.html#Vec">Vec</A> x, <A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> alpha)
</PRE>
Not collective on <A HREF="../Vec/Vec.html#Vec">Vec</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>x </B></TD><TD>- the vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>alpha </B></TD><TD>- the scalar
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>x </B> -the scaled vector
<br>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
For a vector with n components, <A HREF="../Vec/VecScale.html#VecScale">VecScale</A>() computes
<pre>
x[i] = alpha * x[i], for i=1,...,n.
</pre>
<P>
<P>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/vec/vec/interface/rvector.c.html#VecScale">src/vec/vec/interface/rvector.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/vec/vec/examples/tutorials/ex1.c.html">src/vec/vec/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex1f.F90.html">src/vec/vec/examples/tutorials/ex1f.F90.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex1f90.F90.html">src/vec/vec/examples/tutorials/ex1f90.F90.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex20f90.F90.html">src/vec/vec/examples/tutorials/ex20f90.F90.html</A><BR>
<A HREF="../../../src/dm/examples/tutorials/ex1.c.html">src/dm/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/dm/examples/tutorials/ex7.c.html">src/dm/examples/tutorials/ex7.c.html</A><BR>
<A HREF="../../../src/dm/examples/tutorials/ex9.c.html">src/dm/examples/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex28.c.html">src/ksp/ksp/examples/tutorials/ex28.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex49.c.html">src/ksp/ksp/examples/tutorials/ex49.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex15.c.html">src/snes/examples/tutorials/ex15.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex70.c.html">src/snes/examples/tutorials/ex70.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/vec/vec/impls/nest/vecnest.c.html#VecScale_Nest">VecScale_Nest in src/vec/vec/impls/nest/vecnest.c</A><BR>
<A HREF="../../../src/vec/vec/impls/node/vecnode.c.html#VecScale_Node">VecScale_Node in src/vec/vec/impls/node/vecnode.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/bvec1.c.html#VecScale_Seq">VecScale_Seq in src/vec/vec/impls/seq/bvec1.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/seqcuda/veccuda2.cu.html#VecScale_SeqCUDA">VecScale_SeqCUDA in src/vec/vec/impls/seq/seqcuda/veccuda2.cu</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx.html#VecScale_SeqViennaCL">VecScale_SeqViennaCL in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx</A><BR>
<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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