One of his complaints is about truncation and therefore overlapping points. It's very common when you have multiple points occupying the same space to add a 3r

One of his complaints is about truncation and therefore overlapping points. It's very common when you have multiple points occupying the same space to add a 3rd dimension of color ala the hexplot or size of point... or just add "jitter", which is easy in R or SAS. Though, as http://www.statisticalanalysisconsulting.com/scatterplots-dealing-with-overplotting/ http://www.statisticalanalysisconsulting.com/scatterplots-de... points out, past 10,000 points, jitter isn't enough and alternative plots are probably best.