="op">)</span></span></code></pre></div>
<p>Here:</p>
<ul>
<li>x specifies the days after planting (DAP),</li>
<li>y is the GLI variable to be modeled</li>
<li>grp enables group analysis across multiple plots</li>
<li>parameters are the initial parameter values</li>
<li>method specifies the optimization methods to evaluate</li>
</ul>
<p>After fitting, we can inspect the model summary and visualize the fit
using the <code>plot</code> function:</p>
<div class="sourceCode" id="cb8"><pre class="downlit sourceCo