title: ggplot2: scale_y_continuous number of ticks
body: <p>I want to increase number of ticks on my Y axis and don't know how can I achieve this.  </p>
  
  <p>This answer (<a href="https://stackoverflow.com/a/11335933/1286528">https://stackoverflow.com/a/11335933/1286528</a>) is helpful - suggests to use <code>scale_y_continuous(breaks = round(seq(min(dat$y), max(dat$y), by = 0.5),1))</code>. </p>
  
  <p>Problem is that I am using <code>scale_y_continuous(limits = quantile(data, c(0.1, 0.9)))</code> command already and don't know where to add additional command for number of ticks.</p>