title: my graph in ggplot2 contains an "e" character in y-axis
body: <p>What does "e" mean in y-axis?</p>
  
  <pre><code>ggplot(econdata, aes(x = Country, y = GDP_nom)) +
    geom_bar(stat='identity', fill = "forest green") +
    ylab("GDP (nominal)")
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/n13Gm.png" alt="ggplot2 graph example in R language"></p>