e> tibble within the model.</p>
<p>‚ö†Ô∏è <strong>Remarks:</strong></p>
<ul>
<li>The following characters are not permitted in variable names: <code>¬ß</code>, <code>¬£</code>, <code>@</code>, <code>#</code>, <code>$</code>, <code>{</code>, <code>}</code>, <code>;</code>, <code>:</code>, <code>'</code>, <code>\</code>, <code>~</code>, <code>`</code>, <code>?</code>, <code>!</code>, <code>%</code>, <code>^</code>, <code>&amp;</code>, <code>*</code>, <code>(</code>, <code>)</code>, <code>-</code>