If you want to follow along, you can get the code to re-create my sample ... adds a linear regression line, and I also tweak a couple of ggplot design defaults. The graph is stored in a variable ...

NumTweets: num 179 74 604 288 428 173 592 293 That is typically the structure you want for most ggplot graphs. Next I’ll create a grouped ... element_blank(), axis.line = element_line(colour ...