h4>extractDouble</h4>
<pre class="methodSignature">public&nbsp;double[]&nbsp;extractDouble&#8203;(double[]&nbsp;ret,
                              int&nbsp;rl,
                              int&nbsp;ru)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="Array.html#extractDouble(double%5B%5D,int,int)">Array</a></code></span></div>
<div class="block">Extract the sub array into the ret array as doubles.
 
 The ret array is filled from - rl, meaning that t