title: charts.js stacked y-Axis
body: <p>I'm looking for a solution with charts.js to have 4 y-axis which are stacked, but only one x-axis like I can create with plot in R. I found all information about several y-axis, but not stacked.
  Thank in advance for your help.</p>
  <p><a href="https://i.stack.imgur.com/OtVNh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OtVNh.png" alt="Example from R" /></a></p>