class="va">Class</span>, axis2 <span class="op">=</span> <span class="va">Sex</span>, axis3 <span class="op">=</span> <span class="va">Age</span>,</span></span>
<span class="r-in"><span>           color <span class="op">=</span> <span class="va">Survived</span><span class="op">)</span><span class="op">)</span> <span class="op">+</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="stat_stratum.html">stat_stratum</a></span><span class="op">(</span>geom <span class="op">=</span> <span cla