title: Adding Quadrants to R Scatterplots, and lines pointing from plots to their respective labels
body: <p>With ggplot2, can I add four quadrants. Basically just a line down the middle for the y and x axis (a plus sign)? I also wanted to see if i can have a lines pointing from the labels to their respective dots. The labeling overlap is getting problematic.</p>
  
  <p><img src="https://i.stack.imgur.com/0dJWX.png" alt="http://oi57.tinypic.com/1eoolu.jpg"></p>
  
  <pre><code>data$Goal &lt;- factor(data$Goal, levels = c("KPI", 
       "Strategic Support and Relationship Management", 
       "Sales and Marketing Support", 
        "Google AW Account Management and Product Support"))
  library(ggplot2)
  ggplot(data = data, aes(x = X, y = Y,  color = Goal)) + 
    geom_point(size=3) + 
    scale_colour_manual(values = c("blue", "red4", "purple4", "olivedrab")) +
    geom_text(aes(label = Label), color = "black", 
        position = "jitter", hjust=0.6, vjust=1.1, size = 2.5) +
    labs(title = "PSAT", x = "Impact on Overall Satisfaction", y = "Higher Rating")
  </code></pre>