 be coerced to a
string and have <code>'px'</code> appended.</p></td>
    </tr>
    <tr>
      <th>expr</th>
      <td><p>An expression that generates a sigmajs</p></td>
    </tr>
    <tr>
      <th>env</th>
      <td><p>The environment in which to evaluate <code>expr</code>.</p></td>
    </tr>
    <tr>
      <th>quoted</th>
      <td><p>Is <code>expr</code> a quoted expression (with <code><a href='https://www.rdocumentation.org/packages/base/topics/substitute'>quote()</a></code>)? This
is useful if you wan