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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</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-3.14.5 v3.14.5 docs/manualpages/Vec/VecSet.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecSet"><H1>VecSet</H1></A>
Sets all components of a vector to a single scalar value.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecSet.html#VecSet">VecSet</A>(<A HREF="../Vec/Vec.html#Vec">Vec</A> x,<A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> alpha)
</PRE>
Logically 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>
<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></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
For a vector of dimension n, <A HREF="../Vec/VecSet.html#VecSet">VecSet</A>() computes
<pre>
x[i] = alpha, for i=1,...,n,
</pre>
so that all vector entries then equal the identical
scalar value, alpha. Use the more general routine
<A HREF="../Vec/VecSetValues.html#VecSetValues">VecSetValues</A>() to set different vector entries.
<P>
You CANNOT call this after you have called <A HREF="../Vec/VecSetValues.html#VecSetValues">VecSetValues</A>() but before you call
<A HREF="../Vec/VecAssemblyBegin.html#VecAssemblyBegin">VecAssemblyBegin</A>/End().
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecSetValues.html#VecSetValues">VecSetValues</A>(), <A HREF="../Vec/VecSetValuesBlocked.html#VecSetValuesBlocked">VecSetValuesBlocked</A>(), <A HREF="../Vec/VecSetRandom.html#VecSetRandom">VecSetRandom</A>()
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>beginner<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/vec/vec/interface/rvector.c.html#VecSet">src/vec/vec/interface/rvector.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/vec/vec/tutorials/ex1.c.html">src/vec/vec/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex2.c.html">src/vec/vec/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex8.c.html">src/vec/vec/tutorials/ex8.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex11.c.html">src/vec/vec/tutorials/ex11.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex12.c.html">src/vec/vec/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex15.c.html">src/vec/vec/tutorials/ex15.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex18.c.html">src/vec/vec/tutorials/ex18.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex43.c.html">src/vec/vec/tutorials/ex43.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/performance.c.html">src/vec/vec/tutorials/performance.c.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex1f.F90.html">src/vec/vec/tutorials/ex1f.F90.html</A><BR>
<A HREF="../../../src/vec/vec/tutorials/ex1f90.F90.html">src/vec/vec/tutorials/ex1f90.F90.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/vec/vec/impls/nest/vecnest.c.html#VecSet_Nest">VecSet_Nest in src/vec/vec/impls/nest/vecnest.c</A><BR>
<A HREF="../../../src/vec/vec/impls/node/vecnode.c.html#VecSet_Node">VecSet_Node in src/vec/vec/impls/node/vecnode.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/dvec2.c.html#VecSet_Seq">VecSet_Seq in src/vec/vec/impls/seq/dvec2.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx.html#VecSet_SeqKokkos">VecSet_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/seqcuda/veccuda2.cu.html#VecSet_SeqCUDA">VecSet_SeqCUDA in src/vec/vec/impls/seq/seqcuda/veccuda2.cu</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx.html#VecSet_SeqViennaCL">VecSet_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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