>. By default, classmb=~1 if ng&gt;1.</p></dd>


<dt id="arg-ng">ng<a class="anchor" aria-label="anchor" href="#arg-ng"></a></dt>
<dd><p>optional number of latent classes considered. If <code>ng=1</code> (by
default) no <code>mixture</code> nor <code>classmb</code> should be specified. If
<code>ng&gt;1</code>, <code>mixture</code> is required.</p></dd>


<dt id="arg-idiag">idiag<a class="anchor" aria-label="anchor" href="#arg-idiag"></a></dt>
<dd><p>optional logical for the structure of the variance-covaria