title: How to plot stacked point histograms?
body: <p>What's the ggplot2 equivalent of "dotplot" histograms? With stacked points instead of bars? Similar to this solution in R: </p>
  
  <p><a href="https://stackoverflow.com/questions/1934751/plot-histogram-with-points-instead-of-bars">Plot Histogram with Points Instead of Bars</a></p>
  
  <p>Is it possible to do this in ggplot2? Ideally with the points shown as stacks and a faint line showing the smoothed line "fit" to these points (which would make a histogram shape.)</p>