title: ggplot2 Missing y-axis labels
body: <p>Morning,  I have a little problem with my <code>ggplot</code> graph.</p>
  <p>For some reason, I can't see right now, the y axis ticks and numbers are missing. Maybe, I'm missing something really obvious here or it's something in my settings.
  The toothgrowth dataset does not really fit the graph, but you can still see the problem (normally <code>facet_wrap</code> is included, but it does not work with this dataset).</p>
  <pre><code>library(tidyverse)
  library(ggbeeswarm)
  library(gghalves)
  library(tidyr)
  library(ggplot2)
  library(ggpubr)
  
  theme_set(theme_bw(16))
  
  data &lt;- ToothGrowth
  
  a&lt;- ggplot(data, aes(x=supp, y=len)) +
  geom_half_boxplot(
  data = data %&gt;% filter(supp==&quot;OJ&quot;), 
  aes(x = supp, y = len,  fill=supp), outlier.color = NA) +
  scale_fill_manual(values=c(&quot;#F2F2F2&quot;, &quot;#999999&quot;))+
  
  geom_half_boxplot(
  data = data %&gt;% filter(supp==&quot;VC&quot;), 
  aes(x = supp, y = len, fill=supp), side = &quot;r&quot;, outlier.color = NA) +
  
  geom_line(aes(group=supp, colour = supp), position = position_dodge(0.2), alpha = 0.3) +
  geom_point(aes(group=supp, colour = supp),size=1,shape=21, position = position_dodge(0.2)) +
  scale_color_manual(values=c(&quot;chartreuse3&quot;, &quot;yellow2&quot;,
                            &quot;firebrick3&quot;))+
  #  facet_wrap(~ supp)+
  #  theme(
  #    strip.background = element_blank(),
  #    strip.text.x = element_blank())+
  theme(plot.margin=unit(c(0,0,0,0),&quot;cm&quot;))+
  scale_y_discrete(name =&quot;Name&quot;)+
  theme(text = element_text(size=11))+
  theme(legend.position = &quot;none&quot;)
  
  a
  </code></pre>
  <p><a href="https://i.stack.imgur.com/rfpjk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rfpjk.png" alt="Plot" /></a></p>
  <p>Would be great if someone could see the problem; I'm going blind by now. Many thanks!!</p>