3
<title>Copying random number generator state - GNU Scientific Library -- Reference Manual</title>
4
<meta http-equiv="Content-Type" content="text/html">
5
<meta name="description" content="GNU Scientific Library -- Reference Manual">
6
<meta name="generator" content="makeinfo 4.8">
7
<link title="Top" rel="start" href="index.html#Top">
8
<link rel="up" href="Random-Number-Generation.html#Random-Number-Generation" title="Random Number Generation">
9
<link rel="prev" href="Random-number-environment-variables.html#Random-number-environment-variables" title="Random number environment variables">
10
<link rel="next" href="Reading-and-writing-random-number-generator-state.html#Reading-and-writing-random-number-generator-state" title="Reading and writing random number generator state">
11
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
13
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 The GSL Team.
15
Permission is granted to copy, distribute and/or modify this document
16
under the terms of the GNU Free Documentation License, Version 1.2 or
17
any later version published by the Free Software Foundation; with the
18
Invariant Sections being ``GNU General Public License'' and ``Free Software
19
Needs Free Documentation'', the Front-Cover text being ``A GNU Manual'',
20
and with the Back-Cover Text being (a) (see below). A copy of the
21
license is included in the section entitled ``GNU Free Documentation
24
(a) The Back-Cover Text is: ``You have freedom to copy and modify this
25
GNU Manual, like GNU software.''-->
26
<meta http-equiv="Content-Style-Type" content="text/css">
27
<style type="text/css"><!--
28
pre.display { font-family:inherit }
29
pre.format { font-family:inherit }
30
pre.smalldisplay { font-family:inherit; font-size:smaller }
31
pre.smallformat { font-family:inherit; font-size:smaller }
32
pre.smallexample { font-size:smaller }
33
pre.smalllisp { font-size:smaller }
34
span.sc { font-variant:small-caps }
35
span.roman { font-family:serif; font-weight:normal; }
36
span.sansserif { font-family:sans-serif; font-weight:normal; }
42
<a name="Copying-random-number-generator-state"></a>
43
Next: <a rel="next" accesskey="n" href="Reading-and-writing-random-number-generator-state.html#Reading-and-writing-random-number-generator-state">Reading and writing random number generator state</a>,
44
Previous: <a rel="previous" accesskey="p" href="Random-number-environment-variables.html#Random-number-environment-variables">Random number environment variables</a>,
45
Up: <a rel="up" accesskey="u" href="Random-Number-Generation.html#Random-Number-Generation">Random Number Generation</a>
49
<h3 class="section">17.7 Copying random number generator state</h3>
51
<p>The above methods do not expose the random number `state' which changes
52
from call to call. It is often useful to be able to save and restore
53
the state. To permit these practices, a few somewhat more advanced
54
functions are supplied. These include:
57
— Function: int <b>gsl_rng_memcpy</b> (<var>gsl_rng * dest, const gsl_rng * src</var>)<var><a name="index-gsl_005frng_005fmemcpy-1387"></a></var><br>
58
<blockquote><p>This function copies the random number generator <var>src</var> into the
59
pre-existing generator <var>dest</var>, making <var>dest</var> into an exact copy
60
of <var>src</var>. The two generators must be of the same type.
61
</p></blockquote></div>
64
— Function: gsl_rng * <b>gsl_rng_clone</b> (<var>const gsl_rng * r</var>)<var><a name="index-gsl_005frng_005fclone-1388"></a></var><br>
65
<blockquote><p>This function returns a pointer to a newly created generator which is an
66
exact copy of the generator <var>r</var>.
67
</p></blockquote></div>
added
removed
Copying-random-number-generator-state.html
