i_Q_data_1.csv"</span>,</span></span>
<span class="r-in"><span>  package <span class="op">=</span> <span class="st">"photosynthesis"</span></span></span>
<span class="r-in"><span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Define a grouping factor based on light intensity to split the ACi</span></span></span>
<span class="r-in"><span><span class="co"># curves</span></span></span>
<span class="r-in"><span