aria-label="anchor" href="#arg-x-unpenalized"></a></dt>
<dd><p>An input <code>matrix</code> with the same number of rows as
<code>X</code>, for which no L1 penalization will be performed. Note that
<code>X_unpenalized</code> is directly appended to the design matrix; no basis
expansion is performed on <code>X_unpenalized</code>.</p></dd>


<dt id="arg-max-degree">max_degree<a class="anchor" aria-label="anchor" href="#arg-max-degree"></a></dt>
<dd><p>The highest order of interaction terms for which basis
fun