class='fl'>3</span>, <span class='fl'>5</span>, <span class='fl'>19</span>:<span class='fl'>21</span>), <span class='kw'>add</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)</div><div class='output co'>#&gt; <span class='message'>dev.new(): using pdf(file="Rplots16.pdf")</span></div><div class='output co'>#&gt; <span class='message'>dev.new(): using pdf(file="Rplots17.pdf")</span></div><div class='output co'>#&gt; <span class='message'>dev.new(): using pdf(file="Rplots18.pdf")</span></div><di