Update README.md

README.md

@@ -5,3 +5,4 @@ The small script fragments with their explanations can be useful for:
 - representing results as heatmaps (Categorical heatmaps, R)
 - combine tables with a kind of very crude left join written in Python (Get rows py3)
 - represent results as barplots (Tridimensional barplots in R)
+- density coloured scatter plots that avoid overplotting (with ggplot2, R)