title: Error: Continuous value supplied to discrete scale 4
body: <p>I am struggling to add colours to my charts but I keep getting the error:</p>
  
  <pre><code>continuous value supplied to discrete scale
  </code></pre>
  
  <p>This is the code I am using:</p>
  
  <pre><code>ggplot(by_team_mean_score1) +
    geom_col(mapping = aes(x = reorder(team1, mean_score1), y = mean_score1))+
    theme(axis.text.x = element_text(angle = 60, hjust = 1)) +
    ggtitle("Mean No. of Home Goals") +
    xlab("Team") +
    ylab("Mean No. Home Goals")
  </code></pre>