title: set y-axis in millions
body: <p>I have a problem with this plot: </p>
  
  <p>[![enter image description here][1]][1]</p>
  
  <p>The y-axis is in unit but I need them to be in millions as such:</p>
  
  <p>[![enter image description here][2]][2]</p>
  
  <p>Do you know a method to achieve this? Thanks in advance.</p>