class='op'>(</span>time <span class='op'>=</span> <span class='va'>epi</span><span class='op'>$</span><span class='va'>time</span>, y <span class='op'>=</span> <span class='va'>epi</span><span class='op'>$</span><span class='va'>y</span>, y_proportion <span class='op'>=</span> <span class='cn'>TRUE</span><span class='op'>)</span>
</div><div class='output co'>#&gt; [1] 17.1863</div><div class='input'>
</div></pre>
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