11.30 Labels with Comma


ds %>%
  ggplot(aes(wind_dir_9am, fill=wind_dir_9am)) +
  geom_bar() + 
  scale_y_continuous(labels=comma) +
  theme(legend.position="none") +  
  labs(x=vnames["wind_dir_9am"], y="Count")

With ggplot2 (Wickham et al. 2020) Version 0.9.0 the package introduced a mechanism to handle many of the scale operations, in such a way as to support base and lattice graphics, as well as graphics. Scale operations include position guides, as in the axes, and aesthetic guides, as in the legend.

The function scales::comma() is useful for presenting numbers using commas to separate the thousands. This is always a good idea as it assists the reader in quickly determining the magnitude of the numbers we are looking at. As a matter of course, I recommend commas in plots (and tables) at all times. To do so use the ggplot2::scale_continuous() function with labels=comma.

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