ind recipes for using GGIR in specific
non-default scenarios.</p>
<div class="section level2">
<h2 id="handling-externally-derived-epoch-data">Handling externally derived epoch data<a class="anchor" aria-label="anchor" href="#handling-externally-derived-epoch-data"></a>
</h2>
<p>This refers to the situation where external software or hardware was
used to derive epoch level aggregates from accelerometer data.</p>
<p>In <a href="https://wadpac.github.io/GGIR/articles/chapter2_Pipeline.html#externally-derived-