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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="MatGetColumnNorms"><H1>MatGetColumnNorms</H1></A>
Gets the norms of each column of a sparse or dense matrix.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatGetColumnNorms(Mat A,NormType type,PetscReal *norms)
</PRE>
<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>A </B></TD><TD>- the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>type </B></TD><TD>- <A HREF="../Vec/NORM_2.html#NORM_2">NORM_2</A>, <A HREF="../Vec/NORM_1.html#NORM_1">NORM_1</A> or <A HREF="../Vec/NORM_INFINITY.html#NORM_INFINITY">NORM_INFINITY</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>norms </B> -an array as large as the TOTAL number of columns in the matrix
<br>
<P>
<P>
Notes: Each process has ALL the column norms after the call. Because of the way this is computed each process gets all the values,
if each process wants only some of the values it should extract the ones it wants from the array.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
MatGetColumns()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/utils/getcolv.c.html#MatGetColumnNorms">src/mat/utils/getcolv.c</A>
<BR><A HREF="./index.html">Index of all Mat 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>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/mat/examples/tutorials/ex10.c.html">src/mat/examples/tutorials/ex10.c.html</A><BR>
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