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<!DOCTYPE html>
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class="nav-item-name"><a href="module-leaf-detective_helpers.html#.sigmoid">sigmoid</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-leaf-detective_helpers.html#.squaredError">squaredError</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-leaf-detective_main.html">leaf-detective/main</a></span></li>
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<div id="main">
<h1 class="page-title">leaf-detective/helpers</h1>
<section>
<header>
</header>
<article>
<div class="container-overview">
</div>
<h3 class="subsection-title">Methods</h3>
<div class="section-method">
<h4 class="name" id=".plus"><span class="type-signature">(static) </span>plus<span class="signature">(a, b)</span><span class="type-signature"> → {Number}</span></h4>
<div class="description">
<p>Add two numbers</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="helpers.js.html">helpers.js</a>, <a href="helpers.js.html#line13">line 13</a>
</li></ul></dd>
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>a</code></td>
<td class="type">
<span class="param-type"><code>Number</code></span>
|
<span class="param-type"><code>String</code></span>
</td>
<td class="description last">
<p>first number</p>
</td>
</tr>
<tr>
<td class="name"><code>b</code></td>
<td class="type">
<span class="param-type"><code>Number</code></span>
|
<span class="param-type"><code>String</code></span>
</td>
<td class="description last">
<p>second number</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Number</code></span>
</dd>
</dl>
<div class="param-desc">
<p>sum of both numbers</p>
</div>
</div>
<div class="section-examples">
<h5>Example</h5>
<pre class="prettyprint"><code>plus(1, 2)
//=> 3</code></pre>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".shuffle"><span class="type-signature">(static) </span>shuffle<span class="signature">(array)</span><span class="type-signature"> → {Array}</span></h4>
<div class="description">
<p>Shuffle an array using the Fisher-Yates algorithm</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="helpers.js.html">helpers.js</a>, <a href="helpers.js.html#line46">line 46</a>
</li></ul></dd>
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>array</code></td>
<td class="type">
<span class="param-type"><code>Array</code></span>
</td>
<td class="description last">
<p>input array</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Array</code></span>
</dd>
</dl>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".sigmoid"><span class="type-signature">(static) </span>sigmoid<span class="signature">(x)</span><span class="type-signature"> → {Number}</span></h4>
<div class="description">
<p>Map an input number to an output number using the sigmoid function</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="helpers.js.html">helpers.js</a>, <a href="helpers.js.html#line26">line 26</a>
</li></ul></dd>
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>x</code></td>
<td class="type">
<span class="param-type"><code>Number</code></span>
</td>
<td class="description last">
<p>input</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Number</code></span>
</dd>
</dl>
<div class="param-desc">
<p>output</p>
</div>
</div>
<div class="section-examples">
<h5>Example</h5>
<pre class="prettyprint"><code>sigmoid(0)
//=> 0.5</code></pre>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".squaredError"><span class="type-signature">(static) </span>squaredError<span class="signature">(target, output)</span><span class="type-signature"> → {Number}</span></h4>
<div class="description">
<p>Squared error function</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="helpers.js.html">helpers.js</a>, <a href="helpers.js.html#line36">line 36</a>
</li></ul></dd>
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>target</code></td>
<td class="type">
<span class="param-type"><code>Number</code></span>
</td>
<td class="description last">
<p>target / ideal output</p>
</td>
</tr>
<tr>
<td class="name"><code>output</code></td>
<td class="type">
<span class="param-type"><code>Number</code></span>
</td>
<td class="description last">
<p>actual / real output</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Number</code></span>
</dd>
</dl>
</div>
</div>
</article>
</section>
</div>
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