n
is added.</p></dd>


<dt id="arg-data">data<a class="anchor" aria-label="anchor" href="#arg-data"></a></dt>
<dd><p>optional data frame containing the variables named in
<code>fixed</code>, <code>mixture</code>, <code>random</code>, <code>classmb</code> and
<code>subject</code>.</p></dd>


<dt id="arg-b">B<a class="anchor" aria-label="anchor" href="#arg-b"></a></dt>
<dd><p>optional specification for the initial values for the parameters.
Three options are allowed: (1) a vector of initial values is entered 