lity dataset)</span>
<span class='va'>di</span> <span class='op'>&lt;-</span> <span class='st'>"exp"</span>
<span class='va'>dp</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span><span class='op'>(</span>rate <span class='op'>=</span> <span class='fl'>1</span><span class='op'>)</span>
<span class='va'>gg</span> <span class='op'>&lt;-</span> <span class='fu'>ggplot</span><span class='op'>(</span>data <span class='op'>=</span> <span class='va'>airqu