Missing Ribbon in ggplot2
<p>I seem to be having trouble setting up a ribbon in ggplot2 to display. </p>

<p>Here's a made up data set:</p>

<pre><code>Estimate &lt;-  c(100,125,150,175)
GlobalDFData &lt;- data.frame(Estimate, Upper = Estimate + 25, Lower = Estimate - 25, Date = paste0('Q', 1:4,'_16'), Area = 'Global', stringsAsFactors = FALSE)
</code></pre>

<p>Here's the code that I'm trying with no success. I get the line chart but not the upper and lower bounds</p>

<pre><code>ggplot(GlobalDFData, aes(x = Date)) + 
  geom_line(aes(y = Estimate, group = Area, color = Area))+
  geom_point(aes(y = Estimate, x = Date))+
  geom_ribbon(aes(ymin = Lower, ymax = Upper))
</code></pre>