ndex</p><p class="javadoc">Parameters:</p><table class="table table-bordered params"><tr><th width="25%"><code>key</code></th><td><p>the index to use</p></td></tr></table><p class="javadoc">Returns:</p><div class="indent inline-content"><p>Float</p></div></div></div><div class="field "><a name="length"></a><h3><p><code><span class="label">inline</span> <a href="#length"><span class="identifier">length</span></a> ():<span class="type">Float</span></code></p></h3><div class="doc"><p>Calculates the magnitude o