rom <code>pat</code></p></li>
</ol></div>

    <div id="ref-usage">
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">pat_filterDatetime</span><span class="op">(</span></span>
<span>  pat <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  startdate <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  enddate <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  timezone <span class="op">=</span> <span class="cn">NULL</sp