est.mu.i<span class="op">=</span><span class="cn">NULL</span>, b.init<span class="op">=</span><span class="cn">NULL</span>, a.init<span class="op">=</span><span class="cn">NULL</span>,</span>
<span>     c.init<span class="op">=</span><span class="cn">NULL</span>, d.init<span class="op">=</span><span class="cn">NULL</span>, mu.i.init<span class="op">=</span><span class="cn">NULL</span>, Sigma.init<span class="op">=</span><span class="cn">NULL</span>,</span>
<span>     b.lower<span class="op">=</span><span cl