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<div id="function.stats-rand-gen-exponential" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">stats_rand_gen_exponential</h1>
  <p class="verinfo">(PECL stats &gt;= 1.0.0)</p><p class="refpurpose"><span class="refname">stats_rand_gen_exponential</span> &mdash; <span class="dc-title">Generates a random deviate from the exponential distribution</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.stats-rand-gen-exponential-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>stats_rand_gen_exponential</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.float.php" class="type float">float</a></span> <code class="parameter">$av</code></span>): <span class="type"><a href="language.types.float.php" class="type float">float</a></span></div>

  <p class="para rdfs-comment">
   Returns a random deviate from the exponential distribution of which the scale is
   <code class="parameter">av</code>.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.stats-rand-gen-exponential-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">av</code></dt>
     <dd>
      <p class="para">
       The scale parameter
      </p>
     </dd>
    
   </dl>
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.stats-rand-gen-exponential-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   A random deviate
  </p>
 </div>


 


 


 


 


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