emantics><mi>Y</mi><annotation encoding="application/x-tex">Y</annotation></semantics></math>
= survival, and
<math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mi>Z</mi><annotation encoding="application/x-tex">Z</annotation></semantics></math>
= class. Just as was performed in the introductory vignette, we will
load the data and then create a set of partial tables stratified at
fixed levels of class.</p>
<div class="sourceCode" id="cb1"><pre class="downlit sourceCode r">
<code cl