A     B     C</span>
<span class="co">#&gt;   &lt;chr&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt;</span>
<span class="co">#&gt; 1 A1      5    10       1</span>
<span class="co">#&gt; 2 A1      2.5   0       1</span>
<span class="co">#&gt; 3 A1      0     0       1</span>
<span class="co">#&gt; 4 A2      8     5.5    25</span>
<span class="co">#&gt; 5 A2      3     5       7</span>
<span class="co">#&gt; 6 A2      4     6       8</span></code></pre></div>
<p>Across specific columns:</p>
<div class="sourceCode" 