Summary

• ggplot2 uses a grammar of graphics for plotting

• ggplot2 expects tidy data

• Using ggplot2:

ggplot(data, aes(x = x, y = y)) + geom_point()

• Saving a ggplot, directly after plotting:

ggsave("my_filename.png")

• R uses the arrow operator for assignment

my_variable <- 3.14

• swirl can be used as a tool to learn R

library(swirl)
swirl()

• Use readr to load data from a file

library(tidyverse)
read_csv("my_data.csv")

Where to go from here?

• Check the course dates to follow the next session for this course, which has a focus on making your data tidy
• Self study: read these free books
• Other courses in life science and HPC computing