-4"><a href="#cb3-4"></a>breast &lt;-<span class="st"> </span>breast[, <span class="dv">-1</span>]</span>
<span id="cb3-5"><a href="#cb3-5"></a><span class="kw">head</span>(breast, <span class="dv">10</span>)</span>
<span id="cb3-6"><a href="#cb3-6"></a><span class="co">#&gt;    Cl.thickness Cell.size Cell.shape Marg.adhesion Epith.c.size Bare.nuclei</span></span>
<span id="cb3-7"><a href="#cb3-7"></a><span class="co">#&gt; 1             5         1          1             1            2           1</span></