ttps://rdrr.io/r/base/sum.html'>sum</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/NA.html'>is.na</a></span>(<span class='no'>Scorecard</span>$<span class='no'>earnings_med</span>))</div><div class='output co'>#&gt; [1] 15706</div><div class='input'><span class='no'>Scorecard</span> <span class='kw'>&lt;-</span> <span class='no'>Scorecard</span> <span class='kw'>%&gt;%</span>
  <span class='co'># Let's speed this up by just doing four-year colleges in Colorado</span>
  <span class='kw pkg'>dply