ars</span><span class="op">$</span><span class="va">Curve_Tleaf</span> <span class="op">+</span> <span class="fl">273.15</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Fit all models, set Hd to constant in Medlyn model</span></span></span>
<span class="r-in"><span><span class="va">out</span> <span class="op">&lt;-</span> <span class="fu">fit_t_response</span><span class="op">(</span></span></span>
<span class="r-in"><span>  data <span class="op">=</s