geom_smooth() adds a linear regression line, and I also tweak a couple of ggplot design defaults. The graph is stored in a variable called ma_graph. ma_graph <- ggplot(ma_data, aes(x ...

ylab("") + xlab("") Note that I saved everything except the original graph’s first ggplot() line of code to the custom geom. ggplot2 is incredibly powerful and customizable, but sometimes that ...