Plot a boxplot with the data points superimposed.
ScatterBoxPlot( frm, xvar, yvar, title, ..., pt_alpha = 0.3, pt_color = "black", box_color = "black", box_fill = "lightgray" )
data frame to get values from
name of the independent column in frame; assumed discrete
name of the continuous column in frame
(doesn't take additional arguments, used to force later arguments by name)
transparency of points in scatter plot
boxplot line color
boxplot fill color (can be NA for no fill)
xvar is a discrete variable and
yvar is a continuous variable.