nchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="va">tau_ba</span> <span class="op">&lt;-</span> <span class="kw">function</span><span class="op">(</span><span class="va">theta</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span>  <span class="va">theta1</span> <span class="op">&lt;-</span> <span class="va">theta</span><span class="op">[</span><span class="fl">1</span><span cla