true" tabindex="-1"></a>                   <span class="at">qmatrix =</span> Q, <span class="at">gen.inits=</span><span class="cn">TRUE</span>)</span></code></pre></div>
<p>Example (b): Different effect of <code>hieffusn</code> on 1-2 transition rate in each time period</p>
<ul>
<li>use the <code>*</code> operator in the model formula, standard R syntax for interactions in general linear models</li>
</ul>
<div class="sourceCode" id="cb115"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb115