steps, which, unfortunately, are also complex and time-consuming. Specialized R-packages exist to help you with this (see, for example, package <code>GGIR</code> and <code>GENEAread</code>, which are described in more detail in Chapter <a href="rcat.html#rcat">12</a>).</p>
</div>
<div id="feature-extraction" class="section level3">
<h3><span class="header-section-number">6.1.2</span> Feature Extraction</h3>
<p> </p>
<p>Properties of the signals that are of interest are highly dependent on the focus of the s