title: How can I compare two csv file in R?
body: <p>I have two csv file, A and B.</p>
  
  <p>I want to find the number of different column between A and B.</p>
  
  <p>For example, let's assume that A contains 7, 9, 0, 0, 2 and B contains 7,8,6,0,2 ( so A and B have five column each).
  Then, the number of different column is 2, the second and third column.</p>
  
  <p>How can I implement this on R?</p>