title: How to create non linear axis in plot
body: <p>I'm using matplotlib to plot a series of datas and get a result as below</p>
  
  <p><a href="https://i.stack.imgur.com/TmB2a.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TmB2a.png" alt="enter image description here"></a></p>
  
  <p>But I'm expecting to have a non linear axis as below.</p>
  
  <p><a href="https://i.stack.imgur.com/noqR5.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/noqR5.jpg" alt="enter image description here"></a></p>
  
  <p>How can I make that kind of plot? Thanks in advance.</p>