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<span class="r-in"><span><span class="va">fitted.data</span> <span class="op">&lt;-</span> <span class="fu"><a href="fit_model.html">fit_model</a></span><span class="op">(</span><span class="va">level</span>, <span class="va">season</span>,</span></span>
<span class="r-in"><span>  AirPassengers <span class="op">=</span> <span class="va">outcome</span></span></span>
<span class="r-in"><span><span class="op">)</span></span></span>
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