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1 | <html> |
| 2 | <head> | |
| 3 | <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> | |
| 4 | <title>Namespaces</title> | |
| 5 | <link rel="stylesheet" href="../math.css" type="text/css"> | |
| 6 | <meta name="generator" content="DocBook XSL Stylesheets V1.77.1"> | |
| 7 | <link rel="home" href="../index.html" title="Math Toolkit 2.5.1"> | |
| 8 | <link rel="up" href="../overview.html" title="Chapter 1. Overview"> | |
| 9 | <link rel="prev" href="directories.html" title="Directory and File Structure"> | |
| 10 | <link rel="next" href="result_type.html" title="Calculation of the Type of the Result"> | |
| 11 | </head> | |
| 12 | <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> | |
| 13 | <table cellpadding="2" width="100%"><tr> | |
| 14 | <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> | |
| 15 | <td align="center"><a href="../../../../../index.html">Home</a></td> | |
| 16 | <td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> | |
| 17 | <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> | |
| 18 | <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> | |
| 19 | <td align="center"><a href="../../../../../more/index.htm">More</a></td> | |
| 20 | </tr></table> | |
| 21 | <hr> | |
| 22 | <div class="spirit-nav"> | |
| 23 | <a accesskey="p" href="directories.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="result_type.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> | |
| 24 | </div> | |
| 25 | <div class="section"> | |
| 26 | <div class="titlepage"><div><div><h2 class="title" style="clear: both"> | |
| 27 | <a name="math_toolkit.namespaces"></a><a class="link" href="namespaces.html" title="Namespaces">Namespaces</a> | |
| 28 | </h2></div></div></div> | |
| 29 | <p> | |
| 30 | All math functions and distributions are in <code class="computeroutput"><span class="keyword">namespace</span> | |
| 31 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span></code> | |
| 32 | </p> | |
| 33 | <p> | |
| 34 | So, for example, the Students-t distribution template in <code class="computeroutput"><span class="keyword">namespace</span> | |
| 35 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span></code> is | |
| 36 | </p> | |
| 37 | <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">RealType</span><span class="special">></span> <span class="keyword">class</span> <span class="identifier">students_t_distribution</span> | |
| 38 | </pre> | |
| 39 | <p> | |
| 40 | and can be instantiated with the help of the reserved name <code class="computeroutput"><span class="identifier">students_t</span></code>(for | |
| 41 | <code class="computeroutput"><span class="identifier">RealType</span> <span class="keyword">double</span></code>) | |
| 42 | </p> | |
| 43 | <pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">students_t_distribution</span><span class="special"><</span><span class="keyword">double</span><span class="special">></span> <span class="identifier">students_t</span><span class="special">;</span> | |
| 44 | ||
| 45 | <span class="identifier">student_t</span> <span class="identifier">mydist</span><span class="special">(</span><span class="number">10</span><span class="special">);</span> | |
| 46 | </pre> | |
| 47 | <div class="warning"><table border="0" summary="Warning"> | |
| 48 | <tr> | |
| 49 | <td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../../doc/src/images/warning.png"></td> | |
| 50 | <th align="left">Warning</th> | |
| 51 | </tr> | |
| 52 | <tr><td align="left" valign="top"><p> | |
| 53 | Some distribution names are also used in std random library, so to avoid | |
| 54 | the risk of ambiguity it is better to make explicit using declarations, for | |
| 55 | example: <code class="computeroutput"><span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">students_t_distribution</span></code> | |
| 56 | </p></td></tr> | |
| 57 | </table></div> | |
| 58 | <p> | |
| 59 | Functions not intended for use by applications are in <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">detail</span></code>. | |
| 60 | </p> | |
| 61 | <p> | |
| 62 | Functions that may have more general use, like <code class="computeroutput"><span class="identifier">digits</span></code> | |
| 63 | (significand), <code class="computeroutput"><span class="identifier">max_value</span></code>, | |
| 64 | <code class="computeroutput"><span class="identifier">min_value</span></code> and <code class="computeroutput"><span class="identifier">epsilon</span></code> are in <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">tools</span></code>. | |
| 65 | </p> | |
| 66 | <p> | |
| 67 | <a class="link" href="../policy.html" title="Chapter 15. Policies: Controlling Precision, Error Handling etc">Policy</a> and configuration information is in namespace | |
| 68 | <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">policies</span></code>. | |
| 69 | </p> | |
| 70 | <div class="tip"><table border="0" summary="Tip"> | |
| 71 | <tr> | |
| 72 | <td rowspan="2" align="center" valign="top" width="25"><img alt="[Tip]" src="../../../../../doc/src/images/tip.png"></td> | |
| 73 | <th align="left">Tip</th> | |
| 74 | </tr> | |
| 75 | <tr><td align="left" valign="top"><p> | |
| 76 | Many code snippets assume implicit namespace(s), for example, <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span></code> or | |
| 77 | <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span></code>. | |
| 78 | </p></td></tr> | |
| 79 | </table></div> | |
| 80 | </div> | |
| 81 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
| 82 | <td align="left"></td> | |
| 83 | <td align="right"><div class="copyright-footer">Copyright © 2006-2010, 2012-2014 Nikhar Agrawal, | |
| 84 | Anton Bikineev, Paul A. Bristow, Marco Guazzone, Christopher Kormanyos, Hubert | |
| 85 | Holin, Bruno Lalande, John Maddock, Jeremy Murphy, Johan Råde, Gautam Sewani, | |
| 86 | Benjamin Sobotta, Thijs van den Berg, Daryle Walker and Xiaogang Zhang<p> | |
| 87 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 88 | file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) | |
| 89 | </p> | |
| 90 | </div></td> | |
| 91 | </tr></table> | |
| 92 | <hr> | |
| 93 | <div class="spirit-nav"> | |
| 94 | <a accesskey="p" href="directories.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../overview.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="result_type.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> | |
| 95 | </div> | |
| 96 | </body> | |
| 97 | </html> |