arameter initial values and lower/upper bounds in estimation</span></span>
<span><span class="va">model</span><span class="op">$</span><span class="fu">setParameter</span><span class="op">(</span></span>
<span>  theta   <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span>initial <span class="op">=</span> <span class="fl">1</span>, lower<span class="op">=</span><span class="fl">1e-5</span>, upper<span class="op">=</span