title: Why do I get null graphs with ggplot?
body: <p>Why when I use facet_wrap with the function below, I get null outputs for the graphs. A picture of what is going on is attached. The graphs are smushed together and I cannot see any data points. What is going on?</p>
  
  <p><img src="https://i.stack.imgur.com/2MgCJ.png" alt="Image"></p>
  
  <p>I have covered up titles because of confidential.</p>
  
  <p>There will be 100 or so facets.</p>
  
  <pre><code>data &lt;- read.csv(data.csv)
  data$DateTime &lt;- as.POSIXct(data$DateTime,format ='%m/%d/%Y %r')
  data &lt;- data %&gt;% mutate(Person = ifelse(Person == 1, "Person 1", "Person 2"))
  data %&gt;% 
    filter(Size %in% c('S','M')
           ) %&gt;%
    arrange(LargePerson) %&gt;%      
     ggplot(aes(x = DateTime,y = Price)) +
      geom_point(
                 aes(colour = Person)) + 
      scale_colour_manual(values = c("Person 1" = "blue", "Person 2" = "black")) +
      facet_wrap(~ID,scales = "free",ncol=2) + labs(x = "Date") +
      scale_x_datetime(breaks = date_breaks("2 days"),labels = date_format("%m/%d/%y")) +
      theme(axis.text.x = element_text(angle = 90,vjust = 0.5),
            legend.position="bottom"
      )
  </code></pre>