title: Grab one specific column from multiple csv files and merge into one
body: <p>I'd like to grab only the data in the 4th column from all my csv files and write the data into a single file. Each 4th column has a unique header name with the name of the root folder+csv name like <code>FolderA1</code></p>
  
  <p>FolderA /</p>
  
  <pre><code>1.csv |INFO  INFO  INFO  FolderA1  INFO
         Apple Apple Apple Orange    Apple
  
  2.csv |INFO  INFO  INFO  FolderA2 INFO
         Apple Apple Apple Cracker  Apple
  
  3.csv |INFO  INFO  INFO  FOLDERA3 INFO
         Apple Apple Apple Orange  Apple
  </code></pre>
  
  <p>How could I get only the 4th columns data filtered into a single <code>.xlsx</code> file and have the next folders csv's put in a new sheet or separate it from the previous folders csv's? </p>
  
  <pre><code>concentrated.xlsx | FOLDERA1 FOLDERA2 FOLDERA3   FOLDERB1 FOLDERB2 FOLDERB3
                      ORANGE   CRACKER   ORANGE    ORANGE   CRACKER  ORANGE
  </code></pre>