<?xml version='1.0'?>
<html xmlns='http://www.w3.org/1999/xhtml'
      xmlns:math='http://www.w3.org/1998/Math/MathML'
>
<head>
<title>Simulate a [0,1] Uniform Random Variate</title>
<meta name="description" id="description" content="Simulate a [0,1] Uniform Random Variate"/>
<meta name="keywords" id="keywords" content=" "/>
<style type='text/css'>
body { color : black }
body { background-color : white }
A:link { color : blue }
A:visited { color : purple }
A:active { color : purple }
</style>
<script type='text/javascript' language='JavaScript' src='_uniform_01_c_xml.js'>
</script>
</head>
<body>
<table><tr>
<td>
<a href="http://www.coin-or.org/CppAD/" target="_top"><img border="0" src="_image.gif"/></a>
</td>
<td><a href="det_by_minor_c.xml" target="_top">Prev</a>
</td><td><a href="correct_det_by_minor_c.xml" target="_top">Next</a>
</td><td>
<select onchange='choose_across0(this)'>
<option>Index-&gt;</option>
<option>contents</option>
<option>reference</option>
<option>index</option>
<option>search</option>
<option>external</option>
</select>
</td>
<td>
<select onchange='choose_up0(this)'>
<option>Up-&gt;</option>
<option>CppAD</option>
<option>Appendix</option>
<option>compare_c</option>
<option>uniform_01_c</option>
</select>
</td>
<td>
<select onchange='choose_down3(this)'>
<option>CppAD-&gt;</option>
<option>Install</option>
<option>Introduction</option>
<option>AD</option>
<option>ADFun</option>
<option>preprocessor</option>
<option>multi_thread</option>
<option>library</option>
<option>ipopt_solve</option>
<option>Example</option>
<option>speed</option>
<option>Appendix</option>
</select>
</td>
<td>
<select onchange='choose_down2(this)'>
<option>Appendix-&gt;</option>
<option>Faq</option>
<option>Theory</option>
<option>glossary</option>
<option>Bib</option>
<option>Bugs</option>
<option>WishList</option>
<option>whats_new</option>
<option>deprecated</option>
<option>compare_c</option>
<option>License</option>
</select>
</td>
<td>
<select onchange='choose_down1(this)'>
<option>compare_c-&gt;</option>
<option>det_of_minor_c</option>
<option>det_by_minor_c</option>
<option>uniform_01_c</option>
<option>correct_det_by_minor_c</option>
<option>repeat_det_by_minor_c</option>
<option>elapsed_seconds_c</option>
<option>time_det_by_minor_c</option>
<option>main_compare_c</option>
</select>
</td>
<td>uniform_01_c</td>
<td>
<select onchange='choose_current0(this)'>
<option>Headings-&gt;</option>
<option>Syntax</option>
<option>Purpose</option>
<option>seed</option>
<option>n</option>
<option>a</option>
<option>Source Code</option>
</select>
</td>
</tr></table><br/>


<center><b><big><big>Simulate a [0,1] Uniform Random Variate</big></big></b></center>
<br/>
<b><big><a name="Syntax" id="Syntax">Syntax</a></big></b>

<br/>

<code><font color="blue"><span style='white-space: nowrap'>random_seed(</span></font><i><font color="black"><span style='white-space: nowrap'>seed</span></font></i><font color="blue"><span style='white-space: nowrap'>)<br/>
</span></font></code>

<code><font color="blue"><span style='white-space: nowrap'>uniform_01(</span></font><i><font color="black"><span style='white-space: nowrap'>n</span></font></i><font color="blue"><span style='white-space: nowrap'>,&#xA0;</span></font><i><font color="black"><span style='white-space: nowrap'>a</span></font></i><font color="blue"><span style='white-space: nowrap'>)</span></font></code>


<br/>
<br/>
<b><big><a name="Purpose" id="Purpose">Purpose</a></big></b>
<br/>
This routine is used to create random values for speed testing purposes.

<br/>
<br/>
<b><big><a name="seed" id="seed">seed</a></big></b>
<br/>
The argument 
<code><i><font color="black"><span style='white-space: nowrap'>seed</span></font></i></code>
 has prototype

<code><font color="blue"><span style='white-space: nowrap'><br/>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;size_t&#xA0;</span></font><i><font color="black"><span style='white-space: nowrap'>seed</span></font></i><font color="blue"><span style='white-space: nowrap'><br/>
</span></font></code>
It specifies a seed
for the uniform random number generator.

<br/>
<br/>
<b><big><a name="n" id="n">n</a></big></b>
<br/>
The argument 
<code><i><font color="black"><span style='white-space: nowrap'>n</span></font></i></code>
 has prototype

<code><font color="blue"><span style='white-space: nowrap'><br/>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;size_t&#xA0;</span></font><i><font color="black"><span style='white-space: nowrap'>n</span></font></i><font color="blue"><span style='white-space: nowrap'><br/>
</span></font></code>
It specifies the number of elements in the random vector 
<code><i><font color="black"><span style='white-space: nowrap'>a</span></font></i></code>
.

<br/>
<br/>
<b><big><a name="a" id="a">a</a></big></b>
<br/>
The argument 
<code><i><font color="black"><span style='white-space: nowrap'>a</span></font></i></code>
 has prototype

<code><font color="blue"><span style='white-space: nowrap'><br/>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;double*&#xA0;</span></font><i><font color="black"><span style='white-space: nowrap'>a</span></font></i><font color="blue"><span style='white-space: nowrap'><br/>
</span></font></code>
.
The input value of the elements of 
<code><i><font color="black"><span style='white-space: nowrap'>a</span></font></i></code>
 does not matter.
Upon return, the elements of 
<code><i><font color="black"><span style='white-space: nowrap'>a</span></font></i></code>
 are set to values
randomly sampled over the interval [0,1].




<br/>
<br/>
<b><big><a name="Source Code" id="Source Code">Source Code</a></big></b>

<code><font color='blue'><pre style='display:inline'> 
void random_seed(size_t seed)
{	srand(seed); }
void uniform_01(unsigned n, double* a)
{	static double factor = 1. / (double) RAND_MAX;
	while(n--)
		a[n] = rand() * factor;
}
</pre></font></code>


<hr/>Input File: compare_c/det_by_minor.c

</body>
</html>
