e : character. categorical variable name</p></li>
<li><p>level : factor. level of categorical variables</p></li>
<li><p>train : numeric. the relative frequency of the level in the train set</p></li>
<li><p>test : numeric. the relative frequency of the level in the test set</p></li>
<li><p>abs_diff : numeric. the absolute value of the difference between two
relative frequencies</p></li>
</ul></div>
    <div id="details">
    <h2>Details</h2>
    <p>Compare the statistics of the numerical variables of the tra