<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Probability density function of the Weibull distribution</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.stats-dens-uniform.html">stats_dens_uniform</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.stats-harmonic-mean.html">stats_harmonic_mean</a></div>
<div class="up"><a href="ref.stats.html">Statistic Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.stats-dens-weibull" class="refentry">
<div class="refnamediv">
<h1 class="refname">stats_dens_weibull</h1>
<p class="verinfo">(PECL stats >= 1.0.0)</p><p class="refpurpose"><span class="refname">stats_dens_weibull</span> — <span class="dc-title">Probability density function of the Weibull distribution</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.stats-dens-weibull-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">float</span> <span class="methodname"><strong>stats_dens_weibull</strong></span>
( <span class="methodparam"><span class="type">float</span> <code class="parameter">$x</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$a</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$b</code></span>
)</div>
<p class="para rdfs-comment">
Returns the probability density at <code class="parameter">x</code>, where the
random variable follows the Weibull distribution of which the shape parameter
is <code class="parameter">a</code> and the scale parameter is <code class="parameter">b</code>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.stats-dens-weibull-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">x</code></dt>
<dd>
<p class="para">
The value at which the probability density is calculated
</p>
</dd>
<dt>
<code class="parameter">a</code></dt>
<dd>
<p class="para">
The shape parameter of the distribution
</p>
</dd>
<dt>
<code class="parameter">b</code></dt>
<dd>
<p class="para">
The scale parameter of the distribution
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.stats-dens-weibull-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The probability density at <code class="parameter">x</code> or <strong><code>FALSE</code></strong> for failure.
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.stats-dens-uniform.html">stats_dens_uniform</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.stats-harmonic-mean.html">stats_harmonic_mean</a></div>
<div class="up"><a href="ref.stats.html">Statistic Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
