Overlay scatterpoints on split violin plot with ggplot2
问题 I followed this nice answer to generate split violin plots in a 2x2 design Now imagine that these data come from repeated measures in different subjects. I'd like to, additionally, plot the individual data in a scatterplot (I know the plot might end up being too busy, I'd like to see it first). I'm almost there, but have a small error that's probably easily fixed. I include a whole working example in case there's a better way to do this. This first part I copied directly from the previous