title: Introduce explicit line break in ggplot2 on the Y-axis (boxplot)
body: <p>I'm attempting to write some code that can be used to make boxplots of temperatures at which proteins melt at, I'm 99% there except I need to introduce a line break on the y-axis of my boxplot.</p>
  
  <p>Essentially, my current y axis scale goes from 45-60, I want to make the y axis start at 0, line break, 45-60. See the picture as an e.g.</p>
  
  <p><a href="https://i.stack.imgur.com/K5bgH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/K5bgH.png" alt="enter image description here"></a></p>
  
  <p>I've tried using the scale_y_continuous to set a break but that didn't work as I'd hoped. </p>
  
  <pre><code>df %&gt;%
    group_by(Protein) %&gt;%
    ggplot(., aes(x = factor(Protein), y = Melting_Temperature)) +
    geom_boxplot() +
    theme_classic() + 
    geom_point(aes(x = as.numeric(df$Protein) + 0.5, colour = Protein), 
    alpha=0.7)+
    xlab("Protein Type")+
    ylab("Melting Temperature") +
    stat_summary(fun.y=mean, colour = "darkred", geom = "point", shape = 
    18, size = 3, show_guide = FALSE) +
    geom_text(data = means, aes(label = round(Melting_Temperature, 1), y = 
    Melting_Temperature + 0.5))
  </code></pre>