</span></a>. XGB1 is interpretable since it can be interpreted as a GAM with piecewise constant main effects, as follows,</p>
<div class="math notranslate nohighlight">
\[\begin{align}
   g(\mathbb{E}(y|\textbf{x})) = \mu + \sum\limits_{j} h_{j}(x_{j}),  \tag{1}
\end{align}\]</div>
<p>where <span class="math notranslate nohighlight">\(\mu\)</span> is the global intercept, <span class="math notranslate nohighlight">\(h_{j}(x_{j})\)</span> is the main effect of the <span class="math notranslate nohighlight">\