les/tagged_na_usage.html">here</a>
 for more details on how NA's are treated in cchsflow.</p>
    </div>

    <div id="ref-examples">
    <h2>Examples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="co"># Merging two CCHS cycles with variables missing in each cycle.</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># INCGHH_A is a cchsflow variable available for the 2001 CCHS cycle, while</span></span