##'
##' Used to add raw data or summary statistics to the plot of a distribution.
##' The height of Y is arbitrary, and can be set to optimize visualization.
-##' If SE estimates are available, tehse wil be plotted
+##' If SE estimates are available, these will be plotted
##' @name plot.data
##' @title Add data to plot
##' @param trait.data data to be plotted