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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
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<TITLE>VecRestoreArray</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/VecRestoreArray.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecRestoreArray"><H1>VecRestoreArray</H1></A>
Restores a vector after <A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>() has been called.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecRestoreArray.html#VecRestoreArray">VecRestoreArray</A>(<A HREF="../Vec/Vec.html#Vec">Vec</A> x,<A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> **a)
</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>a </B></TD><TD>- location of pointer to array obtained from <A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>()
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
For regular PETSc vectors this routine does not involve any copies. For
any special vectors that do not store local vector data in a contiguous
array, this routine will copy the data back into the underlying
vector data structure from the array obtained with <A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>().
<P>
This routine actually zeros out the a pointer. This is to prevent accidental
us of the array after it has been restored. If you pass null for a it will
not zero the array pointer a.
<P>
<H3><FONT COLOR="#CC3333">Fortran Note</FONT></H3>
This routine is used differently from Fortran 77
<pre>
<A HREF="../Vec/Vec.html#Vec">Vec</A> x
</pre>
<pre>
<A HREF="../Sys/PetscScalar.html#PetscScalar">PetscScalar</A> x_array(1)
</pre>
<pre>
<A HREF="../Sys/PetscOffset.html#PetscOffset">PetscOffset</A> i_x
</pre>
<pre>
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> ierr
</pre>
<pre>
call <A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>(x,x_array,i_x,ierr)
</pre>
<pre>
</pre>
<pre>
Access first local entry in vector with
</pre>
<pre>
value = x_array(i_x + 1)
</pre>
<pre>
</pre>
<pre>
...... other code
</pre>
<pre>
call <A HREF="../Vec/VecRestoreArray.html#VecRestoreArray">VecRestoreArray</A>(x,x_array,i_x,ierr)
</pre>
<P>
See the Fortran chapter of the users manual and
petsc/src/snes/examples/tutorials/ex5f.F for details.
For Fortran 90 see <A HREF="../Vec/VecRestoreArrayF90.html#VecRestoreArrayF90">VecRestoreArrayF90</A>()
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecGetArray.html#VecGetArray">VecGetArray</A>(), <A HREF="../Vec/VecRestoreArrayRead.html#VecRestoreArrayRead">VecRestoreArrayRead</A>(), <A HREF="../Vec/VecRestoreArrays.html#VecRestoreArrays">VecRestoreArrays</A>(), <A HREF="../Vec/VecRestoreArrayF90.html#VecRestoreArrayF90">VecRestoreArrayF90</A>(), <A HREF="../Vec/VecRestoreArrayReadF90.html#VecRestoreArrayReadF90">VecRestoreArrayReadF90</A>(), <A HREF="../Vec/VecPlaceArray.html#VecPlaceArray">VecPlaceArray</A>(), <A HREF="../Vec/VecRestoreArray2d.html#VecRestoreArray2d">VecRestoreArray2d</A>(),
<BR><A HREF="../Vec/VecGetArrayPair.html#VecGetArrayPair">VecGetArrayPair</A>(), <A HREF="../Vec/VecRestoreArrayPair.html#VecRestoreArrayPair">VecRestoreArrayPair</A>()
<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#VecRestoreArray">src/vec/vec/interface/rvector.c</A>
<A HREF="../../../src/vec/vec/utils/tagger/examples/tutorials/ex1.c.html">src/vec/vec/utils/tagger/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex3.c.html">src/vec/vec/examples/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex6.c.html">src/vec/vec/examples/tutorials/ex6.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex9.c.html">src/vec/vec/examples/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex18.c.html">src/vec/vec/examples/tutorials/ex18.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex19.c.html">src/vec/vec/examples/tutorials/ex19.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex21.c.html">src/vec/vec/examples/tutorials/ex21.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex4f.F.html">src/vec/vec/examples/tutorials/ex4f.F.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex4f90.F90.html">src/vec/vec/examples/tutorials/ex4f90.F90.html</A><BR>
<A HREF="../../../src/vec/is/sf/examples/tutorials/ex2.c.html">src/vec/is/sf/examples/tutorials/ex2.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/vec/vec/impls/nest/vecnest.c.html#VecRestoreArray_Nest">VecRestoreArray_Nest in src/vec/vec/impls/nest/vecnest.c</A><BR>
<A HREF="../../../src/vec/vec/impls/node/vecnode.c.html#VecRestoreArray_Node">VecRestoreArray_Node in src/vec/vec/impls/node/vecnode.c</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>
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