19.1 Getting started

Load package:

library(ggplot2)

• All ggplots start with a base layer created with the ggplot() function:

ggplot(data=dataframe, mapping=aes(x=column1, y=column2))

The base layer is setting the grounds but NOT plotting anything:

• You then add a layer (with the + sign) that describes what kind of plot you want:
  • geom_point()
  • geom_bar()
  • geom_histogram()
  • geom_boxplot()
  • …
• And then you will add one layer at a time to add more features to your plot!