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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="SectionRealNorm"><H1>SectionRealNorm</H1></A>
Computes the vector norm.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmmesh.h"
PetscErrorCode SectionRealNorm(SectionReal section, DM dm, NormType type, PetscReal *val)
</PRE>
Collective on Section
<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>section </B></TD><TD>- the real Section
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>type </B></TD><TD>- one of <A HREF="../Vec/NORM_1.html#NORM_1">NORM_1</A>, <A HREF="../Vec/NORM_2.html#NORM_2">NORM_2</A>, <A HREF="../Vec/NORM_INFINITY.html#NORM_INFINITY">NORM_INFINITY</A>. Also available
<A HREF="../Vec/NORM_1_AND_2.html#NORM_1_AND_2">NORM_1_AND_2</A>, which computes both norms and stores them
in a two element array.
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>val </B> -the norm
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<pre>
<A HREF="../Vec/NORM_1.html#NORM_1">NORM_1</A> denotes sum_i |x_i|
</pre>
<pre>
<A HREF="../Vec/NORM_2.html#NORM_2">NORM_2</A> denotes sqrt(sum_i (x_i)^2)
</pre>
<pre>
<A HREF="../Vec/NORM_INFINITY.html#NORM_INFINITY">NORM_INFINITY</A> denotes max_i |x_i|
</pre>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/VecNorm.html#VecNorm">VecNorm</A>(), <A HREF="../DM/SectionRealCreate.html#SectionRealCreate">SectionRealCreate</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/dm/impls/mesh/section.c.html#SectionRealNorm">src/dm/impls/mesh/section.c</A>
<BR><A HREF="./index.html">Index of all DM routines</A>
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