title: R - how can I summarize other columns based on the value in one column
body: <p>I have a file and the first a few lines are:</p>
  
  <pre><code>                  bacttaxa LL8388  UL8388  LL8384  LL8381  UL8382  LL8385
  13603   Yokenella regensburgei      0   0.000   0.000   0.000   0.000  76.192
  15068   Yokenella regensburgei      0   0.000   0.000 399.583   0.000   0.000
  11518 Zobellia galactanivorans      0  83.133 200.795  79.862  90.273  29.303
  19706 Zobellia galactanivorans      0 327.694   0.000 605.251 214.366 453.391
  608      Zunongwangia profunda      0   0.000   0.000   0.000   0.000  96.438
  3159     Zunongwangia profunda      0  14.865  23.004  28.628  11.166  53.613
  </code></pre>
  
  <p>How can I get the sum of the other columns based on the same value in the first column, so I will get the sum for each bacteria taxonomy? Any idea? Thank you!</p>