n id="cb4-5"><a href="#cb4-5"></a><span class="kw">str</span>(breast)</span>
<span id="cb4-6"><a href="#cb4-6"></a><span class="co">#&gt; &#39;data.frame&#39;:    683 obs. of  10 variables:</span></span>
<span id="cb4-7"><a href="#cb4-7"></a><span class="co">#&gt;  $ Cl.thickness   : num  5 5 3 6 4 8 1 2 2 4 ...</span></span>
<span id="cb4-8"><a href="#cb4-8"></a><span class="co">#&gt;  $ Cell.size      : num  1 4 1 8 1 10 1 1 1 2 ...</span></span>
<span id="cb4-9"><a href="#cb4-9"></a><span class="co">#&gt