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<p>Returns the value of the one norm.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include <math.h></code><br />
<code>#include "<a class="el" href="slu__ddefs_8h_source.html">slu_ddefs.h</a>"</code><br />
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Functions</h2></td></tr>
<tr class="memitem:a75a53f4464b95c63adad9e1f63f44d1c"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="dlangs_8c.html#a75a53f4464b95c63adad9e1f63f44d1c">dlangs</a> (char *norm, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *<a class="el" href="zsymv_8c.html#af5d6242ff783dd9efca51eeec1c234f7">A</a>)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p >Copyright (c) 2003, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from U.S. Dept. of Energy)</p>
<p >All rights reserved.</p>
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<pre>
-- SuperLU routine (version 2.0) --
Univ. of California Berkeley, Xerox Palo Alto Research Center,
and Lawrence Berkeley National Lab.
November 15, 1997
Modified from lapack routine DLANGE
</pre> </div><h2 class="groupheader">Function Documentation</h2>
<a id="a75a53f4464b95c63adad9e1f63f44d1c" name="a75a53f4464b95c63adad9e1f63f44d1c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a75a53f4464b95c63adad9e1f63f44d1c">◆ </a></span>dlangs()</h2>
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<td class="memname">double dlangs </td>
<td>(</td>
<td class="paramtype">char * </td>
<td class="paramname"><em>norm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> * </td>
<td class="paramname"><em>A</em> </td>
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<td>)</td>
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<pre>
Purpose
=======
DLANGS returns the value of the one norm, or the Frobenius norm, or
the infinity norm, or the element of largest absolute value of a
real matrix A.
Description
===========
DLANGE returns the value
DLANGE = ( max(<a class="el" href="mc64ad_8c.html#a6a010865b10e541735fa2da8f3cd062d">abs(A(i,j))</a>), NORM = 'M' or 'm'
(
( norm1(A), NORM = '1', 'O' or 'o'
(
( normI(A), NORM = 'I' or 'i'
(
( normF(A), NORM = 'F', 'f', 'E' or 'e'
where norm1 denotes the one norm of a matrix (maximum column sum),
normI denotes the infinity norm of a matrix (maximum row sum) and
normF denotes the Frobenius norm of a matrix (square root of sum of
squares). Note that max(<a class="el" href="mc64ad_8c.html#a6a010865b10e541735fa2da8f3cd062d">abs(A(i,j))</a>) is not a matrix norm.
Arguments
=========
NORM (input) CHARACTER*1
Specifies the value to be returned in DLANGE as described above.
A (input) SuperMatrix*
The M by N sparse matrix A.
=====================================================================
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