title: Problems plotting timeline with different dates in ggplot
body: <p>I am plotting data from two different years (07 and 08) on top of each other. These two years have slightly different dates, but when i plot it in R i am unable to get all the dates, R rearrange them to descending order, or splits them in two different years one after the other with a space between. </p>
  
  <p>I need them on top of each other, with some of the dates slightly skewed.</p>
  
  <p>The dates should be:</p>
  
  <p>data_07[,1]&lt;-c("7/6","21/6","31/6","14/7","28/7","11/8","25/8","8/9")</p>
  
  <p>data_08[,1]&lt;-c("7/6","21/6","5/7","19/7","2/8","16/8","25/8","8/9")</p>
  
  <h1>My script</h1>
  
  <pre><code>data7 &lt;- data.frame(
           Date = c("7/6","21/6","31/6","14/7","28/7","11/8","25/8","8/9"),
           variable = sample(c("Age 39-40", "Age 62-63"), 8, replace = TRUE),
           value = sample(1:8)
      )
  
  
  data8 &lt;- data.frame(
           Date = c("7/6","21/6","5/7","19/7","2/8","16/8","25/8","8/9"),
           variable = sample(c("Age 39-40", "Age 62-63"), 8, replace = TRUE),
           value = sample(1:8)
      )
  
  
  p1&lt;-ggplot(data7, 
      aes(x=Date, y=value, group=variable)) + 
      geom_point(size=2, shape = 15) +
      geom_line(linetype=1) +
  
      geom_line(data=data8, aes(x=Date, y=value, group=variable),linetype=2) +
      geom_point(data=data8, size=2, shape = 1)
  
  
   p1 + facet_wrap( ~ variable, nrow = 5, ncol = 1, scales= "fixed") +
      labs(x="Dates", y="Catches per 20 traps", title="") +
      theme(panel.grid.minor.y = element_blank(),
      panel.grid.major.y = element_blank())
  </code></pre>
  
  <p>Any help and suggestions are appreciated.
  Thank you!</p>
  
  <p>Daniel</p>