1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>SuperLU: SRC/slacon.c File Reference</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
<link href="tabs.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.5.5 -->
<div class="navigation" id="top">
<div class="tabs">
<ul>
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
</div>
<div class="contents">
<h1>SRC/slacon.c File Reference</h1>Estimates the 1-norm. <a href="#_details">More...</a>
<p>
<code>#include <math.h></code><br>
<code>#include "<a class="el" href="slu__Cnames_8h-source.html">slu_Cnames.h</a>"</code><br>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="slacon_8c.html#51b3babab7bbf03500dbc5ede2a682b3">d_sign</a>(a, b) (b >= 0 ? fabs(a) : -fabs(a))</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="slacon_8c.html#dccc1e5692ca1dd160d0ca2a17e1b12c">i_dnnt</a>(a) ( a>=0 ? floor(a+.5) : -floor(.5-a) )</td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="slacon_8c.html#865b6cfd089f47842f95ecfcb1c88355">slacon_</a> (int *n, float *v, float *x, int *isgn, float *est, int *kase)</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
<pre>
-- SuperLU routine (version 2.0) --
Univ. of California Berkeley, Xerox Palo Alto Research Center,
and Lawrence Berkeley National Lab.
November 15, 1997
</pre> <hr><h2>Define Documentation</h2>
<a class="anchor" name="51b3babab7bbf03500dbc5ede2a682b3"></a><!-- doxytag: member="slacon.c::d_sign" ref="51b3babab7bbf03500dbc5ede2a682b3" args="(a, b)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define d_sign </td>
<td>(</td>
<td class="paramtype">a, <tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">b </td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"> (b >= 0 ? fabs(a) : -fabs(a))</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
</div>
</div><p>
<a class="anchor" name="dccc1e5692ca1dd160d0ca2a17e1b12c"></a><!-- doxytag: member="slacon.c::i_dnnt" ref="dccc1e5692ca1dd160d0ca2a17e1b12c" args="(a)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define i_dnnt </td>
<td>(</td>
<td class="paramtype">a </td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"> ( a>=0 ? floor(a+.5) : -floor(.5-a) )</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
</div>
</div><p>
<hr><h2>Function Documentation</h2>
<a class="anchor" name="865b6cfd089f47842f95ecfcb1c88355"></a><!-- doxytag: member="slacon.c::slacon_" ref="865b6cfd089f47842f95ecfcb1c88355" args="(int *n, float *v, float *x, int *isgn, float *est, int *kase)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int slacon_ </td>
<td>(</td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>n</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>v</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>isgn</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"> <em>est</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>kase</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
<pre>
Purpose
=======</pre><p>
<pre> SLACON estimates the 1-norm of a square matrix A.
Reverse communication is used for evaluating matrix-vector products.</pre><p>
<pre> Arguments
=========</pre><p>
<pre> N (input) INT
The order of the matrix. N >= 1.</pre><p>
<pre> V (workspace) FLOAT PRECISION array, dimension (N)
On the final return, V = A*W, where EST = norm(V)/norm(W)
(W is not returned).</pre><p>
<pre> X (input/output) FLOAT PRECISION array, dimension (N)
On an intermediate return, X should be overwritten by
A * X, if KASE=1,
A' * X, if KASE=2,
and SLACON must be re-called with all the other parameters
unchanged.</pre><p>
<pre> ISGN (workspace) INT array, dimension (N)</pre><p>
<pre> EST (output) FLOAT PRECISION
An estimate (a lower bound) for norm(A).</pre><p>
<pre> KASE (input/output) INT
On the initial call to SLACON, KASE should be 0.
On an intermediate return, KASE will be 1 or 2, indicating
whether X should be overwritten by A * X or A' * X.
On the final return from SLACON, KASE will again be 0.</pre><p>
<pre> Further Details
======= =======</pre><p>
<pre> Contributed by Nick Higham, University of Manchester.
Originally named CONEST, dated March 16, 1988.</pre><p>
<pre> Reference: N.J. Higham, "FORTRAN codes for estimating the one-norm of
a real or <a class="el" href="structcomplex.html">complex</a> matrix, with applications to condition estimation",
ACM Trans. Math. Soft., vol. 14, no. 4, pp. 381-396, December 1988.
=====================================================================
</pre>
</div>
</div><p>
</div>
<hr size="1"><address style="text-align: right;"><small>Generated on Thu Aug 25 13:43:49 2011 for SuperLU by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.5 </small></address>
</body>
</html>
|
