org/reference/labs.html" class="external-link">labs</a></span><span class="op">(</span>x <span class="op">=</span> <span class="st">"Fuel efficiency (mpg)"</span>, y <span class="op">=</span> <span class="st">"Weight (tons)"</span>,
       title <span class="op">=</span> <span class="st">"This plot uses Arial Narrow fonts"</span>,
       caption <span class="op">=</span> <span class="st">"Note: Fonts must be installed separately on your system."</span><span class="op">)</span> <span class="op">+</span> 
  <