ode class="sourceCode R"><span><span class="fu"><a href="../reference/filter_dt.html">filter_dt</a></span><span class="op">(</span><span class="va">flights</span>, <span class="va">month</span> <span class="op">==</span> <span class="fl">1</span> <span class="op">&amp;</span> <span class="va">day</span> <span class="op">==</span> <span class="fl">1</span><span class="op">)</span></span></code></pre></div>
<p>Note that comma could not be used in the expressions. Which means
<code>filter_dt(flights, month == 