title: ggplot2: How can I set axis breaks separately for each facet in facet_wrap?
body: <p>I would like to modify the breaks and limits of y-axis of each one of the graphs in the facet_wrap. I want for example reduce the breaks for some of them or I want that they start from 0. </p>
  
  <pre><code>ggplot(granuControlLw, aes(distance, group=time)) 
  + geom_line(aes(y = D))  + xlab("Distance from the gate (m)")
  + geom_point(aes(y = D, shape = factor(time)), size=4.5) + theme_bw()  
  + theme(axis.text.x = element_text(size = 15, angle = 90), axis.text.y = element_text(size = 15, angle = 0)) 
  + scale_x_continuous(breaks=seq(-50,1100,50))  
  + theme(axis.text = element_text(size = 15),axis.title = element_text(size = 15),legend.title = element_text(size = 15, face = 'bold'),legend.text= element_text(size=15), axis.line = element_line(colour = "gray"))
   + theme(strip.background = element_blank())
   + facet_wrap (evolution~ section, scale="free_y", ncol=1) 
  
  Here is a few raws of my input file:
  evolution   time    distance    section D
  D5     After    680     (&gt; S450)    0.8286370543
  D5     After    710     (&gt; S450)    1.0857412286
  D5     After    950     (&gt; S450)    0.29524528
  D5     After    1010    (&gt; S450)    0.7115190438
  D16    After    680     (&gt; S450)    2.7797109467
  D16    After    710     (&gt; S450)    4.2948672219
  D16    After    950     (&gt; S450)    0.5445345574
  D16    After    1010    (&gt; S450)    2.9139811532
  D25    After    680     (&gt; S450)    5.3764331372
  D25    After    710     (&gt; S450)    6.6094309926
  D25    After    950     (&gt; S450)    0.789626722
  D25    After    1010    (&gt; S450)    6.25184791
  D50    After    680     (&gt; S450)    13.0637943297
  D50    After    710     (&gt; S450)    17.155345894
  D50    After    950     (&gt; S450)    3.2134971025
  D50    After    1010    (&gt; S450)    18.9873626321
  D75    After    680     (&gt; S450)    19.491433335
  D75    After    710     (&gt; S450)    26.1926456265
  D75    After    950     (&gt; S450)    12.4823051787
  D75    After    1010    (&gt; S450)    45.0209667314
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/hYrFg.jpg" alt=""></p>