</span><span class='fl'>1972</span>, level <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/vector.html'>as.vector</a></span><span class='op'>(</span><span class='va'>LakeHuron</span><span class='op'>)</span><span class='op'>)</span>

<span class='co'># Basic plot with default colors</span>
<span class='va'>h</span> <span class='op'>&lt;-</span> <span class='fu'>ggplot</span><span class='op'>(</span><span class='va'>huron</span><span class='op'>)</span> <span class='op'>+</span> <s