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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/VecMax.html "><small>Report Typos and Errors</small></a></div>
<A NAME="VecMax"><H1>VecMax</H1></A>
Determines the vector component with maximum real part and its location.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Vec/VecMax.html#VecMax">VecMax</A>(<A HREF="../Vec/Vec.html#Vec">Vec</A> x,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *p,<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *val)
</PRE>
Collective on <A HREF="../Vec/Vec.html#Vec">Vec</A>
<P>
<H3><FONT COLOR="#CC3333">Input 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">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>p </B></TD><TD>- the location of val (pass NULL if you don't want this)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>val </B></TD><TD>- the maximum component
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Returns the value PETSC_MIN_REAL and p = -1 if the vector is of length 0.
<P>
Returns the smallest index with the maximum value
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecNorm.html#VecNorm">VecNorm</A>(), <A HREF="../Vec/VecMin.html#VecMin">VecMin</A>()
<BR><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#VecMax">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/dm/tutorials/ex15.c.html">src/dm/tutorials/ex15.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex72.c.html">src/ksp/ksp/tutorials/ex72.c.html</A><BR>
<A HREF="../../../src/ts/tutorials/ex9.c.html">src/ts/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/ts/tutorials/ex17.c.html">src/ts/tutorials/ex17.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx.html#VecMax_MPIKokkos">VecMax_MPIKokkos in src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx</A><BR>
<A HREF="../../../src/vec/vec/impls/mpi/pvec2.c.html#VecMax_MPI">VecMax_MPI in src/vec/vec/impls/mpi/pvec2.c</A><BR>
<A HREF="../../../src/vec/vec/impls/nest/vecnest.c.html#VecMax_Nest_Recursive">VecMax_Nest_Recursive in src/vec/vec/impls/nest/vecnest.c</A><BR>
<A HREF="../../../src/vec/vec/impls/nest/vecnest.c.html#VecMax_Nest">VecMax_Nest in src/vec/vec/impls/nest/vecnest.c</A><BR>
<A HREF="../../../src/vec/vec/impls/node/vecnode.c.html#VecMax_Node">VecMax_Node in src/vec/vec/impls/node/vecnode.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/dvec2.c.html#VecMax_Seq">VecMax_Seq in src/vec/vec/impls/seq/dvec2.c</A><BR>
<A HREF="../../../src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx.html#VecMax_SeqKokkos">VecMax_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.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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