

    <div id="ref-examples">
    <h2>Examples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="op">{</span></span></span>
<span class="r-in"><span><span class="fu">ef_china_h</span><span class="op">(</span>h <span class="op">=</span> <span class="fl">1600</span>, p <span class="op">=</span> <span class="st">"CO"</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="op">}</span></span></span>
<span class="r-out co"><span cla