title: How to change column to header in excel?
body: <p>a1 | b1 | 0.1</p>
  
  <p>a1 | b2 | 0.2</p>
  
  <p>a2 | b1 | 0.3</p>
  
  <p>a2 | b2 | 0.4</p>
  
  <p>how to transform this table to</p>
  
  <p>xx | a1 | a2</p>
  
  <p>b1 | 0.1 | 0.3</p>
  
  <p>b2 | 0.2 | 0.4</p>