title: Awk: Sum up column values across multiple files with identical column layout
body: <p>I have a number of files with the same header:</p>
  
  <p>COL1, COL2, COL3, COL4</p>
  
  <p>You can ignore COL1-COL3. COL4 contains a number. Each file contains about 200 rows. I am trying to sum up across the rows. For example:</p>
  
  <p>File 1</p>
  
  <pre><code>COL1 COL2 COL3 COL4
   x    y   z    3
   a    b   c    4
  </code></pre>
  
  <p>File 2</p>
  
  <pre><code>COL1 COL2 COL3 COL4
   x     y    z   5 
   a     b    c   10 
  </code></pre>
  
  <p>Then a new file is returned:</p>
  
  <pre><code>COL1 COL2 COL3 COL4
   x     y    z   8 
   a     b    c   14
  </code></pre>
  
  <p>Is there a simple way to do this <em>without</em> AWK? I will use AWK if need be, I just thought there might be a simple one-liner that I could just run right away. The AWK script I have in mind feels a bit long. </p>
  
  <p>Thanks</p>