title: Setting different Y axis limits to each facet in ggplot
body: <p><a href="https://i.stack.imgur.com/l4BRo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/l4BRo.png" alt="enter image description here"></a>I need to modify my code to set different Y axis limits for each chart in the picture attached.
  I would like that the first and second charts from the top have Y axis limits from -4 to -22, the third needs to have Y limits from -4 to 8, the forth from 0 to 90 and the bottom charts from 0 to 1.</p>
  
  <pre><code>myChart &lt;- ggplot() +
  
    geom_line(data=fileInMeltSub, aes(x=DOY, y=value, color=ROI), size=1.4) +
    geom_point(data=fileInMeltSub, aes(x=DOY, y=value, color=ROI), size=2.2) +
  
    # facet
    facet_wrap(~ variable, ncol=1, scales = "free_y") +[![enter image description here][1]][1]
  
    # start X11
    x11(width = 50, height = 50)
    plot(myChart) 
  </code></pre>