>.</span><span class="n">data</span> <span class="p">[,</span><span class="mi">1</span><span class="p">],</span>
          <span class="n">pch</span> <span class="o">=</span> <span class="mi">19</span><span class="p">,</span>
          <span class="n">ylab</span><span class="o">=</span> <span class="s1">&#39;(mm)&#39;</span><span class="p">,</span>
          <span class="n">xlab</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span><span class="p">,</span>
          <span class="nb">type</span> 