title: ggplot: geom_boxplot and geom_jitter
body: <p><strong>Align the data points with the box plot.</strong> </p>
  
  <p>DATA:</p>
  
  <pre><code>data&lt;-structure(list(score = c(0.058, 0.21, -0.111, -0.103, 0.051, 
  0.624, -0.023, 0.01, 0.033, -0.815, -0.505, -0.863, -0.736, -0.971, 
  -0.137, -0.654, -0.689, -0.126), clin = structure(c(1L, 1L, 1L, 
  1L, 1L, 2L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 1L, 2L, 2L, 1L), .Label = 
  c("Non-Sensitive", 
  "Sensitive "), class = "factor"), culture = structure(c(1L, 1L, 
  1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L
  ), .Label = c("Co-culture", "Mono-culture"), class = "factor"), 
      status = structure(c(2L, 2L, 1L, 2L, 2L, 1L, 2L, 2L, 1L, 
      2L, 2L, 1L, 2L, 2L, 1L, 2L, 1L, 2L), .Label = c("new", "old"
      ), class = "factor")), .Names = c("score", "clin", "culture", 
  "status"), class = "data.frame", row.names = c(NA, -18L))
  </code></pre>
  
  <p>CODES:</p>
  
  <pre><code>p&lt;-ggplot(data, aes(culture, as.numeric(score),fill=status))
  
  p+geom_boxplot(outlier.shape = NA)+
     theme_bw()+scale_fill_grey(start = 0.8, end = 1)+
     labs(title="title", x="", y="score",fill="", colour="")+
     geom_jitter(aes(colour = clin), alpha=0.9, 
     position=position_jitter(w=0.1,h=0.1))
  </code></pre>
  
  <p><img src="https://dl.dropboxusercontent.com/u/19585895/sample_rplot.jpg" alt="RESULT"></p>
  
  <p>As you can see, the data points plotted using geom_jitter do not align with the boxplot. I know that I need to provide aes elements to geom_jitter as well - but I not sure how to do it correctly. </p>